Smartwatches / Compare

Amazfit Bip Max vs Fitbit Versa 4

A

Product A: Amazfit

Bip Max

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B

Product B: Fitbit

Versa 4

89 of 150 known

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Every value links to where we found it.

Only differences

AAmazfit Bip Max

BFitbit Versa 4

General

6 of 10 differ

Series

Bip1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

Versa3Press releaseblog.google/products-and-platforms/devices/fitbit/versa-4-sense-2Read 6 October 2026

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

A2568, W2568US2N, W2568US3N, W2568US4N, W2568EU1N, W2568EU2N, W2568EU3N1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026US store variant SKUs W2568US2N (Silver), W2568US3N (Dark Blue) and W2568US4N (Carbon Gray). EU part numbers and A2568 come from other sources.4Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Basic Parameters: model number A2568.10Retailer pageshopro.lt/582687-smartwatch-bip-max-silver-w2568eu1n-amazfit-enRead 16 October 2026Model W2568EU1N, Silver. W2568EU2N (Dark Blue) is on an Estonian retailer page and W2568EU3N (Carbon Gray) on billiger.de.11Retailer pagebilliger.de/pricelist/5875271782-amazfit-bip-max-carbon-grayRead 16 October 2026Listing: Amazfit Bip Max SmartWatch Carbon Gray, W2568EU3N.12Retailer pagearvutitark.ee/en/smart-devices/smartwatchesactivity-monitors/smartwatch-bip-maxdark-blue-w2568eu2n-amazfit-1631542Read 16 October 2026Product code W2568EU2N for the Dark Blue Bip Max.

FB523, FB523BKBK-US, FB523SRAG-US, FB523RGRW-US, FB523RGRD1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Regulatory and Safety Notices: Model FB523 for FCC, IC, EU, UK and the IP rating. Retail colour SKUs are not stored.16Retailer pageabt.com/Fitbit-Versa-4-Graphite-Aluminum-Black-Strap-Fitness-Smartwatch-24mm-FB523BKBKUS/p/182318.htmlRead 7 October 2026Retail colour SKU FB523BKBK-US. Regulatory assembly remains FB523.17Retailer pageabt.com/Fitbit-Versa-4-Platinum-Aluminum-Waterfall-Blue-Strap-Fitness-Smartwatch-24mm-FB523SRAGUS/p/182320.htmlRead 7 October 2026Retail colour SKU FB523SRAG-US. Regulatory assembly remains FB523.18Retailer pageabt.com/Fitbit-Versa-4-Copper-Rose-Aluminum-Pink-Sand-Strap-Fitness-Smartwatch-24mm-FB523RGRWUS/p/182319.htmlRead 7 October 2026Retail colour SKU FB523RGRW-US. Regulatory assembly remains FB523.19Retailer pagephotopoint.ee/en/sports-watches/3626308-fitbit-versa-4-smart-watch-nfc-gps-satellite-amoled-touchscreen-heart-rate-monitor-activityRead 7 October 2026Retail colour SKU FB523RGRD. Regulatory assembly remains FB523.

GTIN / EAN

6978099570077, 6978099570084, 69780995701522Maker product pagede.amazfit.com/products/bip-maxRead 16 October 2026Store variant barcodes: 6978099570077 (Silver), 6978099570084 (Dark Blue), 6978099570152 (Carbon Gray).10Retailer pageshopro.lt/582687-smartwatch-bip-max-silver-w2568eu1n-amazfit-enRead 16 October 2026EAN 6978099570077 for the silver W2568EU1N. It matches the German store barcode.11Retailer pagebilliger.de/pricelist/5875271782-amazfit-bip-max-carbon-grayRead 16 October 2026EAN 6978099570152 for Carbon Gray.

810073611450, 810073611474, 810073611481, 81003885874616Retailer pageabt.com/Fitbit-Versa-4-Graphite-Aluminum-Black-Strap-Fitness-Smartwatch-24mm-FB523BKBKUS/p/182318.htmlRead 7 October 2026Exact FB523BKBK-US Black / Graphite Aluminum listing identifies 810073611450. Regional identifiers are not exchanged.17Retailer pageabt.com/Fitbit-Versa-4-Platinum-Aluminum-Waterfall-Blue-Strap-Fitness-Smartwatch-24mm-FB523SRAGUS/p/182320.htmlRead 7 October 2026Exact FB523SRAG-US Waterfall Blue / Platinum Aluminum listing identifies 810073611474. Regional identifiers are not exchanged.18Retailer pageabt.com/Fitbit-Versa-4-Copper-Rose-Aluminum-Pink-Sand-Strap-Fitness-Smartwatch-24mm-FB523RGRWUS/p/182319.htmlRead 7 October 2026Exact FB523RGRW-US Pink Sand / Copper Rose Aluminum listing identifies 810073611481. Regional identifiers are not exchanged.19Retailer pagephotopoint.ee/en/sports-watches/3626308-fitbit-versa-4-smart-watch-nfc-gps-satellite-amoled-touchscreen-heart-rate-monitor-activityRead 7 October 2026Exact FB523RGRD Beet Juice / Copper Rose Aluminum listing identifies 810038858746. Regional identifiers are not exchanged.

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

20 May 20266Press articlesmartworld.it/news/amazfit-bip-max-prezzo-scheda-tecnica.htmlRead 16 October 2026Published 20 May 2026.7Press articlegagadget.com/en/711363-amazfit-bip-max-a-100-sports-watch-with-a-3000-nit-screen-and-offline-mapsRead 16 October 2026Published 20 May 2026.

24 August 20223Press releaseblog.google/products-and-platforms/devices/fitbit/versa-4-sense-2Read 6 October 2026Fitbit blog post dated Aug 24, 2022. Pre-orders started that day with worldwide availability this fall.

Status

Available1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Store page lists Silver and Carbon Gray in stock and Dark Blue sold out at $99.99 on the access date. Tagged Best Sellers.

Available2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Google Store sells Versa 4 at 199.95 USD on the access date. That is a current price, not the launch price.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$99.991Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Regular price $99.99 at the US store with no compare-at price. US prices exclude sales tax.7Press articlegagadget.com/en/711363-amazfit-bip-max-a-100-sports-watch-with-a-3000-nit-screen-and-offline-mapsRead 16 October 2026$99.99 in the US.

$229.954Press releaseblog.google/products-and-platforms/devices/fitbit/fitbit-sense-2-versa-4Read 6 October 2026Versa 4 is now available for $229.95 (USD). The Aug 24, 2022 announcement gives the same price. No euro launch price was found in a maker source.

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

€99.92Maker product pagede.amazfit.com/products/bip-maxRead 16 October 2026German store price 99.90 EUR for all colours with no compare-at price. VAT is included. The UK and EU stores show the same figure in their currency.6Press articlesmartworld.it/news/amazfit-bip-max-prezzo-scheda-tecnica.htmlRead 16 October 2026Price 99.90 EUR. Italian report, VAT included.8Reviewtour-magazin.de/en/training/smartwatch-for-under-100-euros-amazfit-bip-max-fitness-motivation-on-the-wristRead 16 October 2026Specification list gives 99.90 EUR. A photo caption says 99.95 EUR. The article is dated 22 May 2026.

Not available

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

US, EU1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026US store and the German and EU stores.

US, GB, DE, EE2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026US, GB and DE maker stores offer the model. EE is a documented archived Beet retail listing, not a current-stock assertion.10Maker product pagestore.google.com/gb/product/fitbit_versa_4_specsRead 7 October 2026GB store offers Versa 4 at GBP 179.99 with Buy and all four colours. Current price is not a launch price.11Maker product pagestore.google.com/de/product/fitbit_versa_4_specsRead 7 October 2026DE store offers Versa 4 at EUR 199.95 with Kaufen and all four colours. Current price is not a launch price.19Retailer pagephotopoint.ee/en/sports-watches/3626308-fitbit-versa-4-smart-watch-nfc-gps-satellite-amoled-touchscreen-heart-rate-monitor-activityRead 7 October 2026Exact Beet FB523RGRD SKU was listed by Estonian retailer with Estonia delivery. Listing is now archived. This documents historical market scope rather than current stock.

ColoursiThe maker's own colour names

Silver, Dark Blue, Carbon Gray1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Spec table: Silver, Dark Blue, Carbon Gray.2Maker product pagede.amazfit.com/products/bip-maxRead 16 October 2026Store variants Silver, Dark Blue and Carbon Gray.

Black / Graphite Aluminum, Waterfall Blue / Platinum Aluminum, Pink Sand / Copper Rose Aluminum, Beet Juice / Copper Rose Aluminum2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026

Segment

Smartwatch1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026The page sells it as a hybrid-training smartwatch for everyday and gym use.

Smartwatch2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Page title: Fitbit Versa 4 Smartwatch. The Aug 24, 2022 Fitbit blog calls it a fitness smartwatch.

OS updates promisediYears of explicitly promised OS updates. A security-only support period does not establish an OS-upgrade promise.

Not available

Not available

Security updates untiliExact end date published for security-update support of this model. Do not calculate it from a stated number of years. A security-only period does not promise OS upgrades.

Not available

Not available

Case

6 of 8 differ

Case sizeiMarketed case-size options. The marketed size can differ from physical case height, such as ceramic editions. Base dimensions describe the smallest base-material case.

Not available

Not available

Case shape

Rectangular1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Case dimensions 42.76 x 49.58 mm. The Zepp device list gives a square screen shape at 432 x 514.5Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 16 October 2026Amazfit Bip Max row: screen shape Square, 432 x 514, two physical keys.

Rectangular7Reviewtechradar.com/reviews/fitbit-versa-4Read 6 October 2026Design and display: a friendly-looking square-faced watch. The Google Store gives equal 40.5 mm length and width.

Case materialiMaterial of the housing body, not just the bezel. Use Mixed when the maker describes a mixture of housing/frame materials. Read the published-material field for the parts and proportions.

Mixed materials1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Technical Specifications > Design > Body Material: Frame: Aluminum Alloy. Case: Plastic. Stored as mixed.

Aluminium1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Materials: The housing and buckle on Versa 4 are made of aluminum.

Case material (as published)

Frame: Aluminum alloy. Case: Plastic1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

Aluminum1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026

BackiMaterial of the back of the smallest base-material case. Other materials or regional editions can differ. See source notes.

Not available

Plastic7Reviewtechradar.com/reviews/fitbit-versa-4Read 6 October 2026Design and display: the bezel is aluminum and the rear is plastic. Fitbit publishes no back material.

Case dimensionsiPhysical case height, width and thickness. The source note states exclusions such as the heart-rate sensor protrusion.

Height49.58Width42.76Thickness10.93mm(2 × 1.7 × 0.4 in)1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Case Dimensions 42.76 x 49.58 mm. Thickness 10.93 mm excludes the heart rate sensor and 13.24 mm includes it. The excluded value follows the other Amazfit entries.

Height40.5Width40.5Thickness11.2mm(1.6 × 1.6 × 0.4 in)2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Dimensions and weight: Length 40.5 mm, Width 40.5 mm, Height 11.2 mm. Height is stored as thickness. The listed weight of 37.64 g does not say whether it includes the band, so neither weight field is filled.

Weight (case only)iWatch body without a strap. An unqualified published weight must not be assumed to exclude the strap.

34.3g(1.2 oz)10Retailer pageshopro.lt/582687-smartwatch-bip-max-silver-w2568eu1n-amazfit-enRead 16 October 2026Data sheet: weight 34.3 g and band weight 18.3 g. Together they equal the maker 52.6 g with strap, so 34.3 g is the watch without strap. A German retailer lists the same two figures.

Not available

Weight with strapiWatch with the stated strap attached. Strap material and case size belong in the source note. Reviewer measurements belong in measured fields.

52.6g(1.9 oz)1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Weight (including strap): 52.6 g.

Not available

Durability

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Water resistanceiStatic water-pressure rating in atmospheres. It is not a safe swimming or diving depth. Diving limits are listed separately.

5ATM1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Water-Resistance Grade 5 ATM. Note 10: static pressure equal to 50 m. Not for snorkeling, diving or the sauna.4Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Basic Parameters: water resistance rating 5 ATM.

5ATM1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Environmental conditions: Water resistant up to 50 meters. Fitbit publishes no ATM figure. 50 m equals the 5 ATM static pressure rating.12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Maker comparison explicitly publishes 5 ATM for Versa 4. The existing value is now directly maker-supported, without deriving pressure from metres.

Water resistance standard

ISO 22810:20101Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Note 10: rating according to ISO 22810:2010, tested by SGS.

IEC 605291Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Manual printed page 74 explicitly rates FB523 IPX8 under IEC 60529 up to 50 metres. IEC 60529 applies to water ingress, not an inferred ISO pressure or diving test. Maker comparison independently publishes 5 ATM.

Dust and water rating

Not available

IP6X, IPX81Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026IP Rating section: IPX8 under IEC 60529 up to a depth of 50 meters, and IP6X dust-tight. Stored as the two published codes.

Dive rating

Not available

Not available

Max dive depthiMaker-rated depth for the stated diving use, not a conversion from the water-resistance pressure rating.

Not available

Not available

MIL-STD-810iMaker claim that the watch was tested against specified MIL-STD-810 methods. It is not a guarantee for every military-standard test.

Not available

Not available

MIL-STD-810 tests

Not available

Not available

Operating temperatureiPublished operating range. Source notes identify on-wrist limits and other operating conditions. Storage or charging limits are excluded.

Min0Max45°C4Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Basic Parameters: working temperature 0 to 45 C.

Min-10Max45°C1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Environmental conditions table: operating temperature 14 to 113 F (-10 to 45 C). Non-operating and charging (0 to 35 C) ranges excluded. The Google Store specs page prints -14 to 113 F, which conflicts. The manual table, which states both units, is used.

Display

6 of 14 differ

Display type

OLED1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Display > Material: AMOLED.

OLED2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026

Display type (as published)

AMOLED1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

AMOLED2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Display: AMOLED display, Corning Gorilla Glass 3.

Screen sizeiPublished active display diagonal for a rectangular display, or diameter for a round display. Do not calculate it from pixels or display area.

2.07in(5.3 cm)1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Display Size 2.07 inch, a diagonal. 432 x 514 pixels at 324 ppi fits that diagonal.

1.58in(4 cm)6Reviewpcmag.com/reviews/fitbit-versa-4Read 6 October 2026Both feature a 1.58-inch AMOLED display (Versa 4 and Sense 2). Fitbit publishes no diagonal. Android Central, Trusted Reviews and Stuff state the same 1.58 inches.

Resolution

432 × 514px1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 20265Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 16 October 2026Row: 432 x 514.

336 × 336px6Reviewpcmag.com/reviews/fitbit-versa-4Read 6 October 2026The 336-by-336-pixel display. TechRadar and Android Central state 336 x 336 as well. No pixel density is stored because none is published.7Reviewtechradar.com/reviews/fitbit-versa-4Read 6 October 2026The screen is a 336 x 336 pixel OLED just like the Versa 3's.

Pixel densityiPublished pixel density. A rectangular diagonal formula must not be applied to a round display.

324ppi1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026PPI 324 as published.

Not available

Display area

Not available

Not available

Touchscreen

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Touchscreen row: tempered glass with anti-fingerprint coating. The manual lists tap and swipe gestures.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Navigate Versa 4: Versa 4 has a color AMOLED touchscreen display and 1 button.

Max refresh rateiHighest published display refresh rate in active operation.

Not available

Not available

Min refresh rateiLowest published display refresh rate, usually in always-on mode. It is not the active-use minimum unless stated.

Not available

Not available

Peak brightnessiMaker peak-brightness claim. It may apply to a small area or bright ambient light. Full-screen limits and battery/temperature conditions belong in source notes.

3,000nits1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Peak brightness up to 3,000 nits. Note 11: not supported when battery is below 30 percent, and up to 2,000 nits after automatic brightness is enabled.

Not available

Minimum brightness

Not available

Not available

Always-on display

Yes3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026Always On Display under Settings > Display. It reduces battery life.

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Adjust always-on display section.

Display cover

Other glass1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

Gorilla Glass2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026

Display cover (as published)

Tempered glass + anti-fingerprint coating1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Spec table names the touchscreen cover as tempered glass with an anti-fingerprint coating. No glass brand is named.

Corning Gorilla Glass 32Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026

Platform

5 of 15 differ

Platform

Proprietary5Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 16 October 2026The device runs Zepp OS, the maker own operating system.

Proprietary3Press releaseblog.google/products-and-platforms/devices/fitbit/versa-4-sense-2Read 6 October 2026

OS at launch

Zepp OS 5.05Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 16 October 2026Row lists Zepp OS version 5.0. Press says it launched with Zepp OS 5.0.7Press articlegagadget.com/en/711363-amazfit-bip-max-a-100-sports-watch-with-a-3000-nit-screen-and-offline-mapsRead 16 October 2026Runs ZeppOS 5.0.8Reviewtour-magazin.de/en/training/smartwatch-for-under-100-euros-amazfit-bip-max-fitness-motivation-on-the-wristRead 16 October 2026Lists Zepp OS 5.0.

Fitbit OS3Press releaseblog.google/products-and-platforms/devices/fitbit/versa-4-sense-2Read 6 October 2026Powered by the new Fitbit OS. No version number is published.

Software

Not available

Not available

Latest OS

Zepp OS 5.05Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 16 October 2026The Zepp device list gives Zepp OS version 5.0 for this device on the access date.

Fitbit OS, firmware 220.3113Maker product pagesupport.google.com/googlehealth/answer/14236725Read 7 October 2026Latest maker-listed Versa 4 device firmware on access date. No unreported Fitbit OS major version is assigned. Updates are phased.

Works with

iOS, Android1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

iOS, Android2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026

Phone requirement

Android 7.0 and above, iOS 15.0 and above, with the Zepp app1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Supported Devices: Android 7.0 and above, iOS 15.0 and above. Application: Zepp App.

Google Health app on a compatible device running Apple iOS 16.4 or higher or Android OS 11.0 or higher2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Requirements section, current on the access date. The 2022 launch requirement may have been lower.

App store

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026The manual describes mini app download from the app store in the Zepp app.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026

No6Reviewpcmag.com/reviews/fitbit-versa-4Read 6 October 2026The Versa 4 does not support third-party app downloads, with the exception of watch faces.

Voice assistants

Zepp Flow1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Zepp Flow, select countries and regions. Note 7 lists the languages.

Amazon Alexa1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Voice Assistant: Amazon Alexa Built-in. Needs the phone app running in the background. Not available in all countries.

Chipset

Not available

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Process

Not available

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CPU cores

Not available

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CPU configuration

Not available

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Max CPU clock

Not available

Not available

GPU

Not available

Not available

Low-power coprocessor

Not available

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Memory

1 of 2 differ

RAMiKeep published GB values as stated. Convert a source explicitly labelled MB using 1000 MB per GB and preserve its original figure and unit in the note. Do not assume MB means MiB. Convert explicit MiB or GiB to decimal GB through their byte definitions, recording the conversion in the note. This normalization does not establish an exact physical byte count.

Not available

Not available

StorageiTotal built-in storage the maker states, in decimal GB. Space available to the user is lower and goes in the source note. A figure the maker gives only as available space is not stored.

4GB1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Up to 4GB of onboard storage for offline maps. Podcast playback is to follow by software update. Available space is lower and is not published.

Not available

Health sensors

4 of 8 differ

Heart rate sensor

BioTracker 6.0 PPG biometric sensor (5PD + 2LED)1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Sensors > Health: BioTracker 6.0 PPG biometric sensor (5PD + 2LED).

Multi-path optical heart rate sensor1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Sensors and Components: Multi-path optical heart rate tracker. Google Store spells it Multi-path optical heart rate sensor.

ECG capabilityiElectrical heart sensing hardware with an ECG capability. The ECG app can require an eligible country, age and paired phone.

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026ECG listed as not supported. The maker sensor list names no electrical sensor.

No4Press releaseblog.google/products-and-platforms/devices/fitbit/fitbit-sense-2-versa-4Read 6 October 2026The ECG app is named for Sense 2 only, while Irregular Heart Rhythm Notifications are on both watches. Versa 4 has no electrical heart sensor in its sensor list.6Reviewpcmag.com/reviews/fitbit-versa-4Read 6 October 2026The Sense 2 adds an electrocardiogram (ECG) sensor.

Blood oxygen sensingiBlood-oxygen sensing capability. App availability and medical status vary by market.

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 202624-hour and manual blood-oxygen saturation. Not a medical device.

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Sensors and Components: red and infrared sensors for oxygen saturation (SpO2) monitoring. Not available in all countries and not for medical use.

Skin temperature sensingiA sensor or supported function that measures skin temperature. It is not a core-body thermometer.

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026Skin temperature listed as not supported.

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Track your sleep and Advanced health metrics: skin temperature variation from personal baseline. It reports variation only, not an absolute temperature.2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Sensors and components: Device temperature sensor (skin temperature variation available in the Google Health app). Variation only, not in all markets.

Blood pressure featureiPublished blood-pressure feature category. Hypertension notifications are not numerical blood-pressure readings.

Not available

None14Spec databasegadgetsandwearables.com/technical-specs/fitbit-versa-4Read 7 October 2026Explicit absence of blood-pressure feature. Maker comparison also lacks blood-pressure trends.

Body composition sensor

Not available

Not available

Skin conductance (EDA)

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026Galvanic skin response listed as absent.

No3Press releaseblog.google/products-and-platforms/devices/fitbit/versa-4-sense-2Read 6 October 2026The continuous EDA (cEDA) Body Response sensor is described for Sense 2 only. Versa 4 has no EDA sensor in its own sensor list.6Reviewpcmag.com/reviews/fitbit-versa-4Read 6 October 2026The Sense 2 adds a cEDA sensor and an ECG sensor that the Versa 4 lacks.

Medical clearancesiNamed regulatory clearances and their jurisdiction. General water resistance or an ECG sensor does not establish medical clearance.

Not available

Irregular Heart Rhythm Notifications: FDA clearance, Irregular Heart Rhythm Notifications: EU clearance4Press releaseblog.google/products-and-platforms/devices/fitbit/fitbit-sense-2-versa-4Read 6 October 2026Both of these tools have FDA and EU clearance: the Sense 2 ECG app and the Irregular Heart Rhythm Notifications on both watches. Select countries only, not for people under 22 or with known AFib.

Motion and environment sensors

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Accelerometer

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026

Accelerometer range

Not available

Not available

Gyroscope

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Sensors > Movement lists acceleration, gyroscope, ambient light and geomagnetic sensors.

No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks the gyroscope.

Barometric altimeter

No1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026The complete Movement sensor list has no barometer.9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026Barometric altimeter listed as absent.

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Sensors and Components: Altimeter, which tracks altitude changes. Restart section names a small hole on the device for the altimeter, which is the pressure-sensor vent. Published only as Altimeter.

Compass

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026The geomagnetic sensor is listed and the manual has a Compass app.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026

No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks the compass.

Ambient light sensor

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026

Depth gauge

Not available

Not available

Depth gauge rangeiPublished measurement range of the depth gauge, distinct from maximum diving depth and water-pressure resistance.

Not available

Not available

Water temperature sensor

Not available

Not available

Health and fitness

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Health featuresiSupported health functions with country, phone and subscription restrictions in the source notes. Upcoming functions are not counted as available.

Continuous heart rate, Heart rate alerts, Blood oxygen app, Heart rate variability, Sleep tracking, Sleep stages, Stress tracking, Readiness score, Cycle tracking1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 202624-hour heart rate, blood oxygen and stress, abnormally high and low heart rate reminders, sleep HRV, sleep stages including REM, BioCharge energy monitoring and menstrual cycle tracking. The FAQ says BioCharge shows energy and readiness, so it is stored as readiness score. Not a medical device.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026BioCharge, sleep stages and sleep score, heart rate alerts, low blood oxygen alerts, stress and menstrual cycle tracking are described.

Continuous heart rate, Heart rate alerts, Irregular rhythm notifications, Blood oxygen app, Heart rate variability, Sleep tracking, Sleep stages, Stress tracking, Readiness score, Cycle tracking1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Today app stats: heart rate, oxygen saturation, readiness, stress management score, menstrual health. Track your sleep: sleep stages. Receive heart-rate notifications: high and low heart rate. Advanced health metrics: heart-rate variability. Daily readiness and some detail need Fitbit Premium per the maker blog.3Press releaseblog.google/products-and-platforms/devices/fitbit/versa-4-sense-2Read 6 October 202624/7 heart rate monitoring, sleep tracking and Stress Management Score.4Press releaseblog.google/products-and-platforms/devices/fitbit/fitbit-sense-2-versa-4Read 6 October 2026Irregular Heart Rhythm Notifications on both watches.

Fitness featuresiSupported workout functions. A sport-profile name alone does not prove advanced metrics such as running power or running dynamics. Trackback follows the recorded route back to the start. A compass arrow that points straight to the start does not count.

Automatic workout detection, VO2 max, Training load, Recovery advice, Pool swim, Open water swim, Strength rep counting, Interval workouts, Route navigation, Turn-by-turn navigation, Trackback1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Smarter Metrics: VO2 Max (note 5, outdoor running modes only), Training Load and Training Effect. Heart rate recovery. Pool and open water swimming modes. Strength training with recognition of 25 exercises. Interval training on the watch. Offline maps, track navigation and turn-by-turn directions.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026Navigation pages 21 and 22: track import, track navigation, turn by turn reminders and Backtrack to the start. Automatic workout identification covers walking, running, cycling, pool swimming, elliptical and rowing. Training load, recovery time and VO2 max sit in the workout status pages.

Automatic workout detection, VO2 max, Pool swim, Interval workouts, Turn-by-turn navigation1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Track your exercise automatically (SmartTrack, 15 minute minimum). Exercise settings list Pool Length and Interval. Google Maps app gives turn-by-turn directions and needs the paired phone nearby with the app running. View your cardio fitness score in the Fitbit app (stored as vo2_max, see the Google Health VO2 max help page).9Maker product pagesupport.google.com/googlehealth/answer/14237924Read 6 October 2026Learn about your VO2 max: tap VO2 max (formerly known as cardio fitness score). The Versa 4 manual names the cardio fitness score. VO2 max is estimated during outdoor runs with GPS.

Sport profilesiPublished count of distinct sport/activity profiles. A claim such as 180+ is not an exact integer count.

Not available

Not available

Dive modesiActual supported dive modes. Water resistance or a depth app alone does not establish decompression-capable scuba support.

Not available

Not available

External sensorsiTypes of external workout sensors the watch can pair with. GPS reception, phone data and built-in sensors do not qualify.

Heart rate strap, Power meter, Speed and cadence1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Peripheral list (note 16): heart rate belts, power meters, cadence meters and cycling speedometers. BLE devices only.

Not available

Safety

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Fall detectioniAutomatic fall detection. Incident detection restricted to recorded workouts is not counted as general fall detection.

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026Fall detection listed as not supported.

No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks general fall detection.

Car crash detection

Not available

No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks car crash detection.

Emergency SOSiA manual emergency alert to emergency services or preset contacts. Source notes identify the recipient, paired-phone requirement and country limits. Satellite is listed separately.

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026Emergency SOS listed as not supported.

No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks manual emergency SOS.

Emergency sireniPublished or measured siren sound level in decibels. Audible distance alone does not establish this value. Measurement distance belongs in source notes.

Not available

Not available

Live location sharingiShares live location during supported use. A paired phone or data subscription may be required.

Not available

Not available

Dedicated LED flashlightiA dedicated hardware LED flashlight. Lighting the display white is not counted.

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026LED flashlight listed as not supported. The control centre flashlight is a screen function.

No14Spec databasegadgetsandwearables.com/technical-specs/fitbit-versa-4Read 7 October 2026Explicit absence of dedicated LED flashlight. Display illumination is not that hardware feature.

Positioning

3 of 3 differ

PositioningiPublished satellite systems and signal bands. Do not infer bands from dual-frequency support alone.

GPS, GLONASS, Galileo, QZSS, BeiDou1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026The page says five satellite positioning systems and does not name them. The names come from a spec database.9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026Lists GPS, Galileo, GLONASS, QZSS and BeiDou. The e-manual GNSS receive range 1559-1610 MHz fits these systems.

GPS, GLONASS1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Sensors and Components: Built-in GPS receiver + GLONASS. Dynamic GPS can use the phone's GPS instead to save battery. No band or dual-frequency claim.

Dual-band GNSSiMaker-stated dual-frequency satellite reception. Supported constellations and signal bands are listed separately.

No4Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Basic Parameters: GNSS frequency range 1559-1610 MHz (RX). That is the L1 range only. The maker does not claim dual-band. Stored false.

Not available

Offline mapsiMap data stored on the watch and usable without live phone data. GPX routes or breadcrumb tracks alone are not offline maps.

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Note 3: imports OSM map files for offline use. A route file must be imported for navigation.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026

No14Spec databasegadgetsandwearables.com/technical-specs/fitbit-versa-4Read 7 October 2026Explicit no offline maps. Maker manual requires phone navigation and background app. Directions are not stored cartographic maps.

Connectivity

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BluetoothiPublished Bluetooth support for this model. The version is recorded separately. Unknown version does not mean the radio is absent.

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Connection: Bluetooth, BLE 5.3.

Not available

Bluetooth version

5.34Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Basic Parameters: Bluetooth version V5.3.

5.01Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Wireless technology: Bluetooth 5.0 radio transceiver and NFC chip. Wi-Fi hardware is listed as deactivated and cannot be turned on, so no Wi-Fi standard is stored.

Wi-FiiPublished Wi-Fi support for this model. The standard and bands are recorded separately. Unknown standard does not mean Wi-Fi is absent.

Not available

Not available

Wi-Fi standard

Not available

Not available

Wi-Fi bands

Not available

Not available

CellulariTrue when a cellular edition is sold. A variant row states whether that individual model has cellular hardware.

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026No cellular listed. The maker Connection row lists Bluetooth only.

No8Reviewtomsguide.com/reviews/fitbit-versa-4Read 7 October 2026Fitbit's watches don't have cellular support. Only one radio configuration (FB523, Bluetooth and NFC) exists in the manual.

Network

Not available

Not available

4G bandsiPublished LTE bands for the stated regional cellular model. Do not transfer bands to another region or Wi-Fi-only model.

Not available

Not available

5G bandsiPublished 5G NR bands for the stated regional cellular model. RedCap support does not establish conventional full-bandwidth phone 5G.

Not available

Not available

NFCiSome regions sell an NFC edition, so it is per variant.

No7Press articlegagadget.com/en/711363-amazfit-bip-max-a-100-sports-watch-with-a-3000-nit-screen-and-offline-mapsRead 16 October 2026States no NFC, so no contactless payments.9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026NFC and contactless pay listed as not supported. The maker lists no payment feature.

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026

Contactless payments

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026

Payment services

Not available

Google Wallet1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Contactless Payments: set up Google Wallet in the app. The manual also names the legacy Fitbit Pay app, which Google is phasing out. Card, bank and country limits apply.

Ultra-wideband

No9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026UWB listed as not supported.

No12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026Versa 4 column explicitly lacks UWB radio.

Satellite

None9Spec databasegadgetsandwearables.com/technical-specs/amazfit-bip-maxRead 16 October 2026No satellite SOS listed.

None12Maker product pagestore.google.com/gb/magazine/google_pixel_watch_compareRead 7 October 2026No satellite SOS. Published transmitters are Bluetooth/NFC. GPS reception is separate.

ANT+

No1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Note 16: connection to peripheral devices supports BLE devices only. ANT+ is not listed.

Not available

Audio

1 of 4 differ

Speaker

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Other: Mic and speaker supported.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Sensors and Components lists Speaker and Microphone. The Google Store rates the speaker at 75 dB SPL at 10 cm. That is not an emergency siren.

Microphones

Not available

Not available

Calls on the watchiVoice-call capability of the marketed model, including sold cellular editions. Variant radio capability and paired-phone requirements still apply.

Phone only1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Smartphone Assistance: Bluetooth Calls supported. The watch has no cellular radio, so calls need the paired phone.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026Bluetooth calling: make and receive calls on the watch through the Phone app while connected to the phone.

Phone only1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Answer or reject phone calls: on-wrist calls through the paired iPhone or Android phone, which must be nearby with the Fitbit app running. No cellular model exists.

Music on the watchiPlays audio stored on the watch. Remote control of phone playback or streaming alone does not qualify.

Yes1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026The manual's music player plays .mp3 files stored on the watch through the watch speaker or Bluetooth devices.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026Music player: plays local music stored in the watch through the watch speaker or Bluetooth devices. Files transfer from the Zepp app.

No7Reviewtechradar.com/reviews/fitbit-versa-4Read 6 October 2026You can't store music on the watch. Tom's Guide also says you can't download music to the Versa 4.8Reviewtomsguide.com/reviews/fitbit-versa-4Read 7 October 2026You can't download music to the Versa 4 or install third-party apps.

Controls

3 of 5 differ

ButtonsiPhysical controls used to operate the watch, excluding the rotating crown and strap-release buttons. A clickable rotating crown is counted only in Crown.

21Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Buttons: 2.3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026

11Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Navigate Versa 4: color AMOLED touchscreen display and 1 button.

Named operating buttonsiNames of operating buttons, excluding the crown and strap-release controls.

Upper button, Lower button3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026Upper button and Lower button in the basic operations table.

Button1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Maker calls the single operating control Button. Strap-release latches are excluded.

CrowniA crown that rotates to control the interface. A round push button that does not rotate is not a crown.

None3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026Controls are two buttons and the touchscreen. No crown is described.

None1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026The controls are the touchscreen and 1 button. There is no rotating crown.

Rotating bezeliPhysical rotation or touch gestures around the display edge. A fixed decorative bezel is None.

Not available

Not available

Gestures

Cover the screen to turn it off, Raise wrist to wake the screen3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026Commonly used gestures table: cover the screen to turn it off. Raise-to-wake is part of the maker battery workload (note 1 on the store page).

Turn your wrist, Briefly cover the watch face with your opposite hand, Triple-tap the screen1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Manual screen-wake setting documents selectable wrist-turn wake. Printed page 22 says briefly covering the face turns the screen off, except when always-on display is enabled. Printed page 20 says triple-tap zoom works after Magnify is enabled. These are interface gestures, not unsupported inertial sensor features.

Battery and charging

9 of 13 differ

Battery capacityiPublished battery capacity for the stated case size. Rated and typical capacity are distinguished in source notes.

550mAh1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Battery Capacity 550 mAh (rated value).

Not available

Claimed battery lifeiMaker endurance claims with distinct operating modes and case sizes. With solar describes augmentation of that estimate, not hardware capability. Use false for ordinary claims without solar augmentation, true for explicitly solar-aided claims, and omit it when solar qualification is unclear. Source notes state AOD, GNSS, music and solar conditions. Do not create a normal-use row from an AOD-only claim. Low power denotes the maker battery-saver mode. Keep its typical, light-use and always-on claims separate from standard-mode claims. GPS power saving identifies an intermediate reduced-accuracy GNSS saving preset. Source notes retain the maker's preset name and published conditions. Max battery GPS is the distinct maximum-saving claim. When the maker has only one GPS saving preset, it is GPS power saving.

AAmazfit Bip Max

Mode	With solar	Hours (h)
Smartwatch	No	480
Heavy use	No	240
Always-on	No	168
GPS	No	40

Source1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Typical use up to 20 days, heavy use up to 10 days, AOD mode up to 7 days, continuous GPS up to 40 hours. Days converted exactly to hours. Note 1 gives the workloads. Typical: static watch face, heart rate every 5 minutes, sleep monitoring, three 30-minute GPS workouts a week. Heavy: heart rate every minute, stress and sleep breathing monitoring and 150 notifications a day. AOD scenario: heavy settings plus 10 hours a day of AOD standby. GPS is continuous activity with heart rate always on.

BFitbit Versa 4

Mode	With solar	Hours (h)
Smartwatch	No	144
Always-on	No	72
GPS	No	12

Source5Maker product pagesupport.google.com/googlehealth/answer/14226518Read 6 October 2026Battery life table: Fitbit Versa 4* 6+ days, stored as 144 h as a minimum figure. Footnote *: always-on display and GPS need more frequent charging. If you turn on always-on display: Versa 4 up to 3 days (72 h). If you use built-in GPS continuously: Versa 4 up to 12 hours. The 2025 pre-production test footnote (**) belongs to Google Fitbit Air, not Versa 4.

Smartwatch mode (claimed)iMaker normal-use smartwatch claim without solar. A watch with only an explicit AOD-mode claim has no value here. Workloads differ and source notes must be read.

480h=CalculatedFrom Claimed battery life

144h=CalculatedFrom Claimed battery life

AOD battery life (up to)iMaker claimed smartwatch endurance with the always-on display enabled and without solar, for the base case. Source notes preserve workload and case conditions. This is a claim, not a measured test or an AOD-off estimate.

168h=CalculatedFrom Claimed battery life

72h=CalculatedFrom Claimed battery life

GPS mode (claimed)iMaker regular GPS/GNSS activity claim without solar, for the base case. AOD, multi-band, music and power-saving conditions have separate rows when published.

40h=CalculatedFrom Claimed battery life

12h=CalculatedFrom Claimed battery life

Solar chargingiPublished solar charging hardware capability. An ordinary battery estimate without solar augmentation does not prove that the watch lacks solar charging hardware.

Not available

Not available

Charging methodiThe connection at the watch, not the cable end at the USB adapter. A proprietary inductive puck is not Qi unless interoperability is explicitly established.

Magnetic pins1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Packing list: magnetic charging head (no cable). The manual says the metal contacts on the back of the watch fit the charging base.

Magnetic pins1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Charge your watch: the cable end attaches magnetically to the port on the back and its pins align with the port.

Charging guidanceiPublished charging requirements, nominal estimates and compatibility guidance. Keep adapter ratings separate from power accepted by the watch.

Use the supplied charging base with a Type-C USB cable on a power adapter or computer. The maker recommends an adapter with a charging current of 1 A or more. The adapter rating does not establish power accepted by the watch.4Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Charging the Watch: use the supplied charging base on a Type-C cable. An adapter with 1 A or more is recommended.

Not available

Max charging power (watch)iPublished maximum charging power at the watch. Adapter rating or charger input power does not prove the power accepted by the watch.

Not available

Not available

Fast chargingiAn explicit fast-charging capability claim. A short charging time or high adapter wattage alone does not qualify.

Not available

Yes4Press releaseblog.google/products-and-platforms/devices/fitbit/fitbit-sense-2-versa-4Read 6 October 2026Fast charging gets you a full day's worth of battery in just 12 minutes.

Quick charge claimiMaker claim for usage from a short charge. Source notes identify the usage workload, such as normal use or sleep tracking.

Not available

Charge time12 minUse time24 h1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Charge Versa 4 for 12 minutes for 24 hours of battery life.

Charge 0 to 80% (claimed)iMaker claim for charging an empty battery to 80%. Charger and approximate qualifiers belong in source notes.

Not available

Not available

Full charge time (claimed)iMaker advertised nominal full-charge duration. Approximate or theoretical maker estimates are allowed, with their conditions in source notes. Partial-charge intervals do not qualify. Measured 0 to 100% tests have a separate field.

Not available

120min2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Battery and power: Charge time (0-100%): Two hours. The manual says charging fully takes about 1-2 hours.

Measured

1 of 4 differ

Peak brightness (measured)iReviewer measurement. Source notes state screen area, mode and ambient light. A small-area peak claim cannot be replaced with a full-screen measurement.

Not available

Not available

Battery life (measured)iReviewer-observed mixed-use endurance. Source notes state case size, AOD, workout use and whether it was a complete discharge. Extrapolation from partial discharge is excluded.

Not available

Not available

Battery tests (measured)iReviewer-observed endurance, with case size and test settings in source notes. Partial-discharge projections are not stored as measured endurance.

Not available

Not available

Full charge time (measured)iReviewer measurement from empty to full, not 0-80% or a charge from 5%. Source notes name the charger and case size.

Not available

60min8Reviewtomsguide.com/reviews/fitbit-versa-4Read 7 October 2026Reviewer observed depleted-to-full charging using the proprietary USB-A-ended charging arrangement. Standard 40.5 mm Copper Rose review unit. USB power adapter, ambient temperature and firmware are unstated. This is a measured result, separate from the maker two-hour claim. Partial-discharge runtime projections are not added.

Strap

6 of 6 differ

Lug widthiDistance between standard strap attachment lugs, not the decorative width of a proprietary strap. Unknown for custom connectors unless the maker publishes lug width.

22mm1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Strap > Width: 22 mm.

Not available

Quick-release strapiThe supplied strap can be detached through its quick-release mechanism. Compatibility with quick-release replacement straps alone does not qualify.

No3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026Strap guide: insert the strap pin, then press the spring bar with a finger or tool. A spring bar is not a quick-release lever, so false.4Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Same spring bar instruction.

Yes1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Change the band: slide the flat latch button toward the band and pull. Attach by pressing until it clicks. No tools.

Strap systemiPublished attachment system and compatible case sizes. Proprietary connectors are distinguished from standard spring bars.

Spring bar strap attachment, 22 mm strap width4Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Assembling the strap: align the strap pin with the lug hole and press the spring bar.

Proprietary latch connector. Fitbit Sense, Sense 2 and Versa 3 bands are compatible.1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Change the band: Fitbit Sense, Fitbit Sense 2, and Fitbit Versa 3 bands are compatible with Versa 4. Turn over Versa 4 and find the band latches. Slide the flat button toward the band to release the latch. Proprietary connector, no lug width published.

Strap materialiMaterial of the supplied strap for the stated package. Do not substitute material from another band sold separately.

Silicone1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Strap > Materials: Liquid Silicone.

Other1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Supplied classic band is elastomer. Other preserves that wording without guessing silicone, HNBR or fluoroelastomer.

Strap

Standard liquid silicone strap1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026The store names no strap model. The packing list says standard strap.

Classic band2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Maker box lists Classic band in small and large sizes. Manual printed page 57 states flexible durable elastomer. band_material=other preserves that published material without guessing a specific polymer.

Strap sizesiPublished wrist-circumference range for the stated strap or case. Source notes distinguish an overall compatible wrist range from one supplied strap size.

AAmazfit Bip Max

Not available

BFitbit Versa 4

Size	Wrist (min) (mm)	Wrist (max) (mm)
Small	140	180
Large	180	220

Source1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Band size table: Small 140-180 mm, Large 180-220 mm wrist circumference. The Google Store specs page prints Small 5.1-7 in and Large 6.5-8.6 in. The manual table is used.

Regulatory

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FCC ID

Not available

XRAFB5231Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026USA FCC statement: Model FB523, FCC ID XRAFB523. IC 8542A-FB523.

SAR limb (US)iPublished limb/wrist SAR for the stated base regional model under the US regime. Other case sizes or radio versions can differ. Head or body SAR is excluded.

Not available

Not available

SAR limb (EU)iPublished limb/wrist SAR for the stated base regional model under the EU regime. Other case sizes or radio versions can differ. Head or body SAR is excluded.

Not available

Not available

Other certifications

Not available

RED (2014/53/EU), UK Radio Equipment Regulations 2017, IEC 62368-1:20181Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Manual printed page 62 declares FB523 compliance with RED 2014/53/EU. Printed page 72 declares UK Radio Equipment Regulations 2017. Printed page 74 lists testing to IEC 62368-1:2018 safety certification. These are model declarations and safety tests, not medical, military or diving certifications.

In the box

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In the box

Smartwatch (including standard strap), Magnetic charging head (no cable), Instruction manual1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Packing List: smartwatch (including standard strap), magnetic charging head (no cable), instruction manual.

Fitbit Versa 4, Classic band (small & large), Charging cable2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026

Power adapter in boxiA mains/USB power adapter is supplied. A charging cable, inductive puck or charging dock alone does not count.

No1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026Only a charging head is supplied. No cable and no mains adapter.

No2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026What's in the box lists only Fitbit Versa 4, Classic band (small & large) and Charging cable. No power adapter.

Links

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Product page

us.amazfit.com/products/bip-max1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

store.google.com/us/product/fitbit_versa_4_specs2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026

Spec sheet

us.amazfit.com/products/bip-max1Maker product pageus.amazfit.com/products/bip-maxRead 16 October 2026

store.google.com/us/product/fitbit_versa_4_specs2Maker product pagestore.google.com/us/product/fitbit_versa_4_specsRead 7 October 2026Online maker specification sheet for regulatory model FB523.

Manual

support.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdf3Owner's manualsupport.amazfit.com/en/amazfit_bip_max/files/user-manual.pdf.pdfRead 16 October 2026

storage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsK1Owner's manualstorage.googleapis.com/support-kms-prod/aMr9HIIq7XWrbNCLHQyr9sA3nP2Y6JUWITsKRead 7 October 2026Versa 4 User Manual Version 2.1, linked from the Fitbit user manuals help page (support.google.com/googlehealth/answer/14253977).

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

Not available

Not available

Warranty

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Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

1year4Owner's manualsupport.amazfit.com/en/amazfit_bip_max/imgs/electronic_manual.pdfRead 16 October 2026Warranty and Return Policy: 12 months or the period local consumer law requires.

1year15Maker product pagesupport.google.com/product-documentation/answer/14815834Read 7 October 2026Manufacturer contractual warranty for original new US Fitbit Versa 4 / FB523 retail units purchased before July 11, 2023: one year. Exact US Abt FB523BKBK-US also states one-year limited parts/labour warranty. The original maker contract separately gives two years for an EEA resident purchasing in the EEA, including the retained Estonian market. This scalar applies only to the stated US source-market contract, not all variants. Later purchases use the separate Google Hardware Warranty Center terms.16Retailer pageabt.com/Fitbit-Versa-4-Graphite-Aluminum-Black-Strap-Fitness-Smartwatch-24mm-FB523BKBKUS/p/182318.htmlRead 7 October 2026Exact new US FB523BKBK-US listing states one-year limited parts and labour warranty. This source-market claim is distinct from the maker two-year EEA contract and does not set the Estonian variant warranty.

Both are also in the API. Back to all smartwatches.