Smartwatches / Compare

Amazfit Active Max vs Garmin Forerunner 55

A

Product A: Amazfit

Active Max

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B

Product B: Garmin

Forerunner 55

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Only differences

AAmazfit Active Max

BGarmin Forerunner 55

General

7 of 10 differ

Series

Active1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

Forerunner1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Product title Forerunner 55. Garmin Forerunner running watch line.

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

W2557AP1N2Maker product pageus.amazfit.com/products/active-max.jsRead 14 October 2026Store product data: SKU W2557AP1N, the only variant, Default Title. Manual model numbers A2556 and A2557 cover the global and the US edition. The EU edition W2556GL1N and its NFC are not added.

A04162, 010-02562-50, 010-02562-51, 010-02562-52, 010-02562-531Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026The page colour selector lists 010-02562-50 Black, 010-02562-51 White, 010-02562-52 Aqua and 010-02562-53 Grey. These are the Singapore part numbers. A04162 is the hardware model number from the manual and the EU declaration.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Back cover: M/N A04162.4Maker spec sheet (PDF)static.garmin.com/pumac/Forerunner%2055_DoC-EU.pdfRead 6 October 2026EU Declaration of Conformity, issued 23/03/2021, revised 14/08/2025: Model Numbers A04162, Forerunner 55.

GTIN / EAN

8500716187612Maker product pageus.amazfit.com/products/active-max.jsRead 14 October 2026Store barcode 850071618761.

7537592833227Retailer pageelectronicscrazy.sg/garmin-gm-010-02562-50-forerunner-55-smartwatch-blackRead 7 October 2026Exact Singapore black SKU 010-02562-50. No barcode from the European -10 model is transferred. Published text: Model: GM-010-02562-50. GTIN, UPC, EAN, JAN or ISBN: 753759283322

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

30 December 20253Press releasenasdaq.com/press-release/amazfit-introduces-active-max-bigger-brighter-and-built-maximum-performance-2025-12Read 14 October 2026

2 June 20213Press releasegarmin.com/en-US/newsroom/press-release/wearables-health/garmin-2Read 6 October 2026Olathe, June 2, 2021 announcement.

Status

Available1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Store page shows Add to cart, the product is in stock at 169.99 USD on the accessed date.

Not available

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

Garmin Forerunner 7020Maker product pagegarmin.com/nl-NL/blog/verschillen-forerunner-70-en-forerunner-55Read 23 October 2026Garmin's Dutch blog says the Forerunner 70 is the successor of the Forerunner 55.

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

$1693Press releasenasdaq.com/press-release/amazfit-introduces-active-max-bigger-brighter-and-built-maximum-performance-2025-12Read 14 October 2026Pricing and Availability: $169.00 on Amazfit.com and Amazon. The US store lists 169.99 USD today. Tom's Guide names the starting price as $169.

$199.993Press releasegarmin.com/en-US/newsroom/press-release/wearables-health/garmin-2Read 6 October 2026Suggested retail price of $199.99.

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.

Not available

€199.998Press releasegarmin.com/fr-FR/newsroom/journee-mondiale-de-la-course-a-pied-garminlance-la-forerunner-55-une-montre-de-running-connectee-pour-un-style-de-vie-sain-et-equilibreRead 7 October 2026Garmin France launch release, 2 June 2021, public euro recommended retail price. The original black, white and aqua packages are included. This is not the later Grey package price. Published text: 3 modèles, noir, blanc ou bleu, sont disponibles dès à présent au prix public conseillé de 199,99 €.

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

US1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

SG7Retailer pageelectronicscrazy.sg/garmin-gm-010-02562-50-forerunner-55-smartwatch-blackRead 7 October 2026The exact 010-02562-50 package is listed for Singapore. This is the source market, not an inferred language market. Published text: Sold and shipped from Singapore

ColoursiThe maker's own colour names

Black1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

Black, White, Aqua, Grey1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Colour names verbatim from the Singapore colour selector. The US launch release names black, white and aqua. Grey appears on the Singapore page only.3Press releasegarmin.com/en-US/newsroom/press-release/wearables-health/garmin-2Read 6 October 2026Black, white or aqua at launch.

Segment

Sport1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Active family positioned for training. Tom's Guide calls it a sports-oriented smartwatch.

Sport3Press releasegarmin.com/en-US/newsroom/press-release/wearables-health/garmin-2Read 6 October 2026Maker describes it as an easy-to-use GPS running 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.

48.5mm1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Case width and height 48.5 mm. Colour: Black only.

42mm1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026One size. Specs: Physical size 42 x 42 x 11.6 mm. Reviews confirm only a 42 mm case is sold.6Reviewtechradar.com/reviews/garmin-forerunner-55Read 6 October 2026The Forerunner 55 is only available with a 42mm case.

Case shape

Round1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

Round1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Maker product photos show a round case with a round 1.04 in display.

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/active-maxRead 14 October 2026Technical Specifications > Body Material: Frame: Aluminum Alloy, Case: Polymer. Stored as mixed.

Plastic10Reviewtechradar.com/reviews/garmin-forerunner-55Read 7 October 2026Housing material. Garmin does not publish a housing material in the exact model comparison table. The separate maker datasheet bezel row must not be treated as housing material. Published text: The watch has a plastic case (in black, white or aqua)

Case material (as published)

Aluminum alloy frame with polymer case1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

Plastic10Reviewtechradar.com/reviews/garmin-forerunner-55Read 7 October 2026Broad published material. Gadgets & Wearables specifies a fibre-reinforced polymer case, which is a plastic subtype. Galaxus independently calls the case plastic. No back material is inferred. Published text: The watch has a plastic case

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

Not available

Not available

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

Height48.5Width48.5Thickness12.2mm(1.9 × 1.9 × 0.5 in)1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Technical Specifications > Dimensions (without heart rate base): 48.5 x 48.5 x 12.2 mm.

Height42Width42Thickness11.6mm(1.7 × 1.7 × 0.5 in)1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Specs: Physical size 42 x 42 x 11.6 mm. The page does not say whether the thickness includes the heart rate sensor.

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

39.5g(1.4 oz)1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Weight (without strap): 39.5 g. No weight with strap is published.

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.

Not available

37g(1.3 oz)11Maker product pagegarmin.com/en-GB/compareRead 7 October 202642 mm watch with its supplied silicone strap. Maker weight is unqualified. Forbes explicitly says 37 g including strap at https://www.forbes.com/sites/andrewwilliams/2026/04/28/the-surprising-garmin-watch-london-marathon-winner-sabastian-sawe-used/. This qualifies the matching maker weight. No case-only value is inferred. Published text: Weight: 37 g12Press articleforbes.com/sites/andrewwilliams/2026/04/28/the-surprising-garmin-watch-london-marathon-winner-sabastian-sawe-usedRead 7 October 2026Explicit strap scope of the matching maker 37 g claim: weighing just 37g including strap. This is reported specification prose, not a reviewer scale measurement.19Maker product pagegarmin.com/es-MX/compareRead 7 October 2026Exact single-product maker Peso 37 g. Forbes independently supplies including-strap scope for same published 37 g. Not inferred case-only mass or measurement.

Durability

2 of 8 differ

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/active-maxRead 14 October 2026Water-Resistance Grade 5 ATM. Footnote 14: 50 m static, tested to ISO 22810:2010 by TUV-SUD.4Owner's manualteamplush.by/wp-content/uploads/2026/03/ebee4a37f9738b85defbef6b93194aef44753e63015757d5d56ccbd7659e6d1e_optim_cropped.pdfRead 14 October 2026Basic Parameters: water resistance rating 5 ATM. Repair and Maintenance says the watch cannot be used for snorkeling, diving or high-speed water activities.

5ATM1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 20262Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 49: Water rating Swim, 5 ATM. Footnote: withstands pressure equivalent to a depth of 50 m.

Water resistance standard

ISO 22810:20101Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Footnote 14: according to ISO 22810:2010, passed third-party testing by TUV-SUD.

Not available

Dust and water rating

Not available

Not available

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 manualteamplush.by/wp-content/uploads/2026/03/ebee4a37f9738b85defbef6b93194aef44753e63015757d5d56ccbd7659e6d1e_optim_cropped.pdfRead 14 October 2026Basic Parameters, model number A2556/A2557: working temperature 0 to 45 C. Reseller-hosted copy of Amazfit's Product Manual (importer Beryko).

Min-20Max60°C2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 49 Specifications: operating temperature range -20 to 60 C. Charging range 0 to 45 C is separate.

Display

8 of 14 differ

Display type

OLED1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

MIP1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026

Display type (as published)

AMOLED1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

Sunlight-visible, transflective memory-in-pixel (MIP)1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026

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

1.5in(3.8 cm)1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Display Size 1.5 in, AMOLED.

1.04in(2.6 cm)1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Specs: Display size 1.04 in (26.3 mm) diameter.

Resolution

480 × 480px1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

208 × 208px1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026

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

323ppi1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Display PPI: 323, as published.

Not available

Display area

Not available

Not available

Touchscreen

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

No5Reviewdcrainmaker.com/2021/06/garmin-forerunner-55-depth-review.htmlRead 6 October 2026There's no touchscreen here. Two buttons on the right, three on the left.

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/active-maxRead 14 October 2026Peak up to 3,000 nits. Footnote 4: 3,000 nit brightness is not supported below 30% battery. With automatic brightness enabled the watch can reach up to 2,000 nits in some environments. Peak claim, not a measurement.

Not available

Minimum brightness

Not available

Not available

Always-on display

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Technical Specifications > Battery lists AoD mode battery life of up to 10 days.5Owner's manualsupport.amazfit.com/en/amazfit_active_max/files/user-manual.pdf.pdfRead 14 October 2026Always On Display: enable the AOD in Settings > Display. Standby screen keeps time and some watch face information.

Yes5Reviewdcrainmaker.com/2021/06/garmin-forerunner-55-depth-review.htmlRead 6 October 2026The screen is always-on, all the time. MIP display.

Display cover

Other glass1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

Other glass1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Specs: Lens material chemically strengthened glass. No brand name is given.

Display cover (as published)

Strengthened glass with anti-fingerprint coating1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Touchscreen: strengthened glass plus anti-fingerprint coating. Not sapphire.

Chemically strengthened glass1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026

Platform

4 of 15 differ

Platform

Proprietary1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Zepp OS is Amazfit's own watch software. The Software Updates section names Zepp OS 6.

Proprietary13Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-55Read 7 October 2026Exact model specification inventory. Not Wear OS or watchOS. Published text: Operating system at launch Garmin proprietary

OS at launch

Zepp OS 56Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-maxRead 14 October 2026Operating system at launch: Zepp OS 5.

Garmin proprietary13Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-55Read 7 October 2026Published software family. No unsupported launch firmware number is supplied. Published text: Operating system at launch Garmin proprietary

Software

Zepp OS1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

Not available

Latest OS

Zepp OS 61Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Software Updates, August 2026 OTA 4: upgraded to Zepp OS 6. The os.zepp.com Zepp OS 6 list also names Active Max.10Maker product pageos.zepp.com/compatibility-zepp-os-6Read 14 October 2026Current maker compatibility list names Amazfit Active Max for Zepp OS 6. This is the current major version, not a patch version. Feature availability varies by watch.

Forerunner 55 software 11.0314Maker product pageforums.garmin.com/sports-fitness/running-multisport/f/forerunner-55-series/416431/forerunner-55-series-software-update-11-03---100Read 7 October 2026Official Garmin staff release announcement. Latest confirmed public software rollout located as of 2026-10-07. User reports of 11.04 have no official release proof and are not substituted. Published text: Software version 11.03 for the Forerunner 55 is at 100% rollout.

Works with

iOS, Android1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Supported Devices: Android 7.0 and above, iOS 14.0 and above. Requires the Zepp App. The user manual says iOS 14.0 and the reseller-hosted product manual says iOS 15.0, so no phone requirement text is stored.

iOS, Android1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026

Phone requirement

Not available

Not available

App store

Yes9Spec databasethe5krunner.com/specs/amazfit/active-maxRead 14 October 2026App ecosystem row: Zepp OS third-party mini-app store.

Yes1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026

Voice assistants

Zepp Flow1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Zepp Flow, select countries and regions. English, French, German, Italian, Spanish, Japanese, Korean and Portuguese.

Not available

Chipset

Not available

Not available

Process

Not available

Not available

CPU cores

Not available

Not available

CPU configuration

Not available

Not available

Max CPU clock

Not available

Not available

GPU

Not available

Not available

Low-power coprocessor

Not available

Not available

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/active-maxRead 14 October 20264GB storage, nominal.

32 MB11Maker product pagegarmin.com/en-GB/compareRead 7 October 2026Published onboard data-history memory, not RAM, user-free capacity or Connect IQ app RAM. Decimal MB to GB conversion. Independently confirmed on exact Forerunner 55 010-02562-02 maker page https://www.garmin.com/es-MX/p/741137/pn/010-02562-02/, which states Memoria/historial 32 MB. Older 200-hour activity-history claims are not converted to capacity. Direct compare shell needs JavaScript, readable indexed maker table supplied the exact one-product column. Published text: Memory/history: 32 MB19Maker product pagegarmin.com/es-MX/compareRead 7 October 2026Public indexed exact single-product Forerunner 55 maker comparison table Memoria/historial 32 MB, independently read in full. Decimal 0.032 GB. History-data storage, not RAM or user-free capacity. Direct HTTP compare shell requires JavaScript and is not bypassed.

Health sensors

5 of 8 differ

Heart rate sensor

BioTracker PPG biometric sensor (5 photodiodes and 2 LEDs)1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Sensors > Health: BioTracker PPG biometric sensor (5PD + 2LED).

Garmin Elevate wrist heart rate monitor1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Sensors table: Garmin Elevate wrist heart rate monitor. DC Rainmaker identifies it as the Elevate V3 sensor.

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

No6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-maxRead 14 October 2026Electrical heart rate: No. ECG: No. The maker sensor list has only the PPG sensor.

No13Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-55Read 7 October 2026Exact model health feature inventory. Garmin maker sensor table lists Elevate optical HR and accelerometer, no ECG. Published text: ECG No

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

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Blood-oxygen saturation 24-hour and manual measurement. Not a medical device.

No5Reviewdcrainmaker.com/2021/06/garmin-forerunner-55-depth-review.htmlRead 6 October 2026Garmin doesn't enable PulseOx on the FR55, so you won't get blood oxygen levels with this watch.

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

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 202624H Monitoring lists skin temperature (thermometer).

No13Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-55Read 7 October 2026Exact model health feature inventory. Weather temperatures and phone forecasts are not skin-temperature sensing. Published text: Skin temperature No

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

Not available

None13Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-55Read 7 October 2026Exact model feature inventory. Optical heart rate and all-day stress are separate functions. Published text: Blood pressure No

Body composition sensor

Not available

Not available

Skin conductance (EDA)

Not available

No13Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-55Read 7 October 2026Exact model sensor inventory. Stress estimates do not establish EDA hardware. Published text: Galvanic skin response No

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

Not available

Not available

Motion and environment sensors

5 of 9 differ

Accelerometer

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

Yes1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026

Accelerometer range

Not available

Not available

Gyroscope

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

No1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026The Sensors table lists only GPS, GLONASS, Galileo, the Garmin Elevate wrist heart rate monitor and Accelerometer. Garmin lists gyroscope, compass and barometric altimeter in this table on watches that have them.

Barometric altimeter

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 20265Owner's manualsupport.amazfit.com/en/amazfit_active_max/files/user-manual.pdf.pdfRead 14 October 2026Control center supported features include Barometer.

No1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Not in the Sensors table, which lists only GPS, GLONASS, Galileo, Elevate HR and Accelerometer. DC Rainmaker readers confirm no barometric altimeter.

Compass

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026The user manual Control Center lists Compass and Barometer. The spec table lists a geomagnetic sensor.5Owner's manualsupport.amazfit.com/en/amazfit_active_max/files/user-manual.pdf.pdfRead 14 October 2026Control center supported features include Barometer and Compass.8Reviewlivescience.com/health/exercise/amazfit-active-max-smartwatch-reviewRead 14 October 2026Review lists single-band GPS, compass and altimeter.

No1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Not in the Sensors table, which lists only GPS, GLONASS, Galileo, Elevate HR and Accelerometer.

Ambient light sensor

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

No13Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-55Read 7 October 2026Exact model sensor inventory. Gesture and manually adjustable backlight are separate functions. Published text: Ambient light sensor No

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

No13Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-55Read 7 October 2026Exact model sensor inventory explicitly lists no temperature sensor. Current weather from a paired phone is not onboard sensing. Published text: Temperature No

Health and fitness

3 of 5 differ

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

Heart rate alerts, Blood oxygen app, Heart rate variability, Sleep tracking, Sleep stages, Stress tracking, Readiness score, Cycle tracking1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Heart rate, SpO2 and stress monitoring, abnormal high and low heart-rate alerts and low SpO2 alerts, sleep stages including REM, sleep HRV, sleep score, BioCharge/HybridCharge energy score and menstrual cycle tracking. Heart-rate sampling can be set to 1 minute at the lowest, so continuous heart rate is not claimed. No ECG, sleep apnea or hypertension features.

Continuous heart rate, Heart rate alerts, Sleep tracking, Sleep stages, Stress tracking, Cycle tracking1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Health Monitoring: wrist-based heart rate (constant, every second), abnormal heart rate alerts (high and low), all-day stress, sleep (advanced), Woman's Health. Sleep stages from the manual page 19. Wellness functions, not medical.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 19: sleep statistics include total hours of sleep, sleep stages and sleep movement. Page 23: abnormal heart rate alert.

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, Ski resort maps1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Smart recognition of 8 sports and 25 strength movements, VO2 max, training load, recovery time, rep, set and rest detection, interval training on the watch, pool and open water swimming modes, offline maps with turn-by-turn directions and imported-route navigation. VO2 max and real-time performance scores work in running modes only. 170+ sports modes is not an exact count.

Automatic workout detection, VO2 max, Recovery advice, Pool swim, Interval workouts1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Training table: VO2 Max (Run), Recovery time, Interval training. Swimming: Pool Swimming profile only, no open water profile. Move IQ is listed. The manual page 20 says Move IQ can automatically start and save a timed walking or running activity. The page footnote says the watch is not compatible with on-device courses.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 20: Move IQ can automatically start and save a timed walking or running activity. Page 14 interval workouts. Page 25 VO2 max estimate for running. Page 26 recovery time.

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/active-maxRead 14 October 2026Connection to Peripheral Workout Devices: heart rate belt, running and cycling power meters, cycling speedometer and cadence meter. Footnote 13: Bluetooth LE devices only.

Heart rate strap, Speed and cadence, Foot pod1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Foot pod capable, Speed and cadence sensor support. The manual page 22 adds ANT+ chest heart rate monitors. DC Rainmaker notes there is no direct power meter support.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 22: compatible with ANT+ chest heart rate monitors. Page 37 foot pod. Page 38 bike speed or cadence sensor.

Safety

3 of 6 differ

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

No7Reviewtomsguide.com/wellness/smartwatches/amazfit-active-max-review-a-high-end-garmin-dupe-for-the-price-of-an-entry-level-smartwatchRead 14 October 2026You won't find fall or crash detection.

No1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Safety table: Incident Detection during select activities only. By the field definition this is not general fall detection.

Car crash detection

No7Reviewtomsguide.com/wellness/smartwatches/amazfit-active-max-review-a-high-end-garmin-dupe-for-the-price-of-an-entry-level-smartwatchRead 14 October 2026You won't find fall or crash detection.

Not available

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.

No6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-maxRead 14 October 2026Emergency SOS: No. Satellite SOS: No. Fall detection: No.

Yes1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Safety table: Assistance. Sends a message with location to emergency contacts set in Garmin Connect. Needs a paired phone with data. It does not contact emergency services.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 32: hold LIGHT to send a message with name, LiveTrack link and GPS location to emergency contacts. The Garmin Connect app does not contact emergency services. Needs a paired phone with a data plan.

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

Yes1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Safety table: LiveTrack. Needs a paired phone with data.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 32: LiveTrack lets friends and family follow races and training in real time.

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

No6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-maxRead 14 October 2026LED flashlight: No. The control center flashlight lights the display, which is not a dedicated LED.

No13Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-55Read 7 October 2026Exact model feature inventory. Display backlight is not a dedicated flashlight. Published text: LED flashlight No

Positioning

3 of 3 differ

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

GPS, GLONASS, Galileo, QZSS, BeiDou6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-maxRead 14 October 2026Sensors list GPS, Galileo, GLONASS, QZSS and BeiDou. The maker page says five satellite systems without naming them. Frequency bands are not given.

GPS, GLONASS, Galileo1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Sensors table: GPS, GLONASS, Galileo. The manual page 42 names the same three systems.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 42: GPS, GLONASS and GALILEO. GPS + GLONASS and GPS + GALILEO are separate settings.

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

No7Reviewtomsguide.com/wellness/smartwatches/amazfit-active-max-review-a-high-end-garmin-dupe-for-the-price-of-an-entry-level-smartwatchRead 14 October 2026The onboard GPS antenna is a single-band affair.8Reviewlivescience.com/health/exercise/amazfit-active-max-smartwatch-reviewRead 14 October 2026Review calls the GPS single-band. Its unit lists Zepp Pay NFC, so it may be the EMEA edition.

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/active-maxRead 14 October 2026Free downloadable maps, with OSM import. Footnote 2: the downloaded map must match the real location and a route file must be imported for navigation. Maps include ski resorts.

No6Reviewtechradar.com/reviews/garmin-forerunner-55Read 6 October 2026The display isn't high-res enough to show maps of running routes. The maker page also says the watch is not compatible with on-device courses.

Connectivity

7 of 15 differ

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/active-maxRead 14 October 2026Connection: Bluetooth, BLE 5.3.

Not available

Bluetooth version

5.31Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Connection: Bluetooth, BLE 5.3.4Owner's manualteamplush.by/wp-content/uploads/2026/03/ebee4a37f9738b85defbef6b93194aef44753e63015757d5d56ccbd7659e6d1e_optim_cropped.pdfRead 14 October 2026Basic Parameters: Bluetooth version V5.3, 2400-2483.5 MHz, output power under 13 dBm.

4.1 BLE15Retailer pagegalaxus.at/en/s1/producttype/smartwatches-2446/brand/garmin-201/compare/forerunner-55-vs-70-25652Read 7 October 2026Forerunner 55 left column, SKU 010-02562-10, 42 mm. Maker states Bluetooth Low Energy without a core version. Only published retailer version is stored. Bluetooth software version numbers such as 0.00 are unrelated. Published text: Bluetooth version: 4.1 BLE

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

No6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-maxRead 14 October 2026Wi-Fi: No. The maker spec table lists no Wi-Fi.

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.

No6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-maxRead 14 October 2026Cellular: No.7Reviewtomsguide.com/wellness/smartwatches/amazfit-active-max-review-a-high-end-garmin-dupe-for-the-price-of-an-entry-level-smartwatchRead 14 October 2026Spec table: cellular support No.

No1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Connectivity row lists Bluetooth and ANT+ only. All four colour part numbers share one spec table. No cellular edition is listed.

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.

Not available

No2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 49 Specifications: Wireless frequency 2.4 GHz @ 1 dBm maximum. No 13.56 MHz NFC radio is listed. The maker page lists no Garmin Pay.

Contactless payments

Not available

No9Maker spec sheet (PDF)shop.meinetelewelt.at/public/files/pdf/1.75.479.10150-Datenblatt.pdfRead 7 October 2026Forerunner 55 column in the maker datasheet comparison table, page 3. Filled dot denotes supported, open circle unsupported. Garmin Pay is absent. Published text: Garmin Music | Garmin Pay: ○|○

Payment services

Not available

Not available

Ultra-wideband

Not available

No13Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-55Read 7 October 2026Exact model radio inventory. Maker-hosted A04162 radio report lists ANT and BLE only. Published text: UWB No

Satellite

Not available

Not available

ANT+

No1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Footnote 13: peripheral devices connect over Bluetooth LE only. No ANT+ is listed.

Yes1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 20262Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 37: the watch pairs with wireless sensors using ANT+ or Bluetooth technology.

Audio

4 of 4 differ

Speaker

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Speaker and Mic: Support.

No13Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-55Read 7 October 2026Exact model audio inventory. Manual key and alert tones are beeps, not a voice/media speaker. Published text: Speakers No

Microphones

Not available

013Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-55Read 7 October 2026Exact model audio inventory lists no microphone. This is zero installed microphones, not an unspecified voice assistant microphone count. Published text: Microphone No

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/active-maxRead 14 October 2026FAQ: Bluetooth phone calls and texts through the paired phone. No cellular model.

None13Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-55Read 7 October 2026Exact model capability inventory. Incoming call notifications and phone controls are separate from speaking on the watch. Published text: Bluetooth calling No

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/active-maxRead 14 October 20264GB for up to 100 hours of podcast playback. Continuous GPS usage with music: up to 22 hours. Footnote 1 says podcast support arrives by software update. The FAQ says third-party music apps cannot be installed.7Reviewtomsguide.com/wellness/smartwatches/amazfit-active-max-review-a-high-end-garmin-dupe-for-the-price-of-an-entry-level-smartwatchRead 14 October 20264GB of onboard storage for saving up to 100 hours of music or podcasts.

No9Maker spec sheet (PDF)shop.meinetelewelt.at/public/files/pdf/1.75.479.10150-Datenblatt.pdfRead 7 October 2026Forerunner 55 column in the maker datasheet comparison table, page 3. No Garmin Music. Phone playback remote control is a separate supported function. Published text: Garmin Music | Garmin Pay: ○|○

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/active-maxRead 14 October 2026Technical Specifications > Buttons: 2.

52Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 5 Device Overview lists five buttons: LIGHT, START STOP, BACK, DOWN, UP.

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

Up button, Down button4Owner's manualteamplush.by/wp-content/uploads/2026/03/ebee4a37f9738b85defbef6b93194aef44753e63015757d5d56ccbd7659e6d1e_optim_cropped.pdfRead 14 October 2026About the Watch: Up button and Down button. Strap-lug screws are not operating buttons.

LIGHT, START STOP, BACK, DOWN, UP2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Button labels verbatim from page 5 Device Overview.

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

None5Owner's manualsupport.amazfit.com/en/amazfit_active_max/files/user-manual.pdf.pdfRead 14 October 2026Basic operations show touch gestures, an upper button and a lower button. No rotating crown.

None2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 5 Device Overview shows five push buttons and no crown.

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

None5Owner's manualsupport.amazfit.com/en/amazfit_active_max/files/user-manual.pdf.pdfRead 14 October 2026No rotating bezel in the manual. Tom's Guide calls the tachymeter bezel faux and flush with the glass, so it is decorative.

None2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 5 Device Overview shows five push buttons and no rotating bezel. The bezel carries printed button labels.

Gestures

Cover the screen to turn it off5Owner's manualsupport.amazfit.com/en/amazfit_active_max/files/user-manual.pdf.pdfRead 14 October 2026Basic operations, page 2: cover the screen to turn it off.

Raise and turn wrist to activate backlight16Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 7 October 2026Owner manual version 9, January 2026, printed page 45 Changing the Backlight Settings. Supports separate activity and non-activity settings. No touchscreen gesture is claimed. Published text: Select Gesture to turn on the backlight by raising and turning your arm to look at your wrist.

Battery and charging

7 of 13 differ

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

658mAh1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026658 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 Active Max

Mode	With solar	Hours (h)
Smartwatch	No	600
Heavy use	No	312
Always-on	No	240
GPS	No	64
GPS with music	No	22

Source1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Up to values. Typical 25 days: static watch face, voice assistant off, heart rate every 5 minutes, 8 hours a day sleep and breathing monitoring, 15 minutes a week calls, 30 minutes a week music and three 30-minute GPS runs a week. Heavy 13 days: dynamic watch face, voice assistant on, heart rate every minute, 30 minutes a week calls, 60 minutes a week music and the same GPS runs. AoD mode 10 days has no stated conditions beyond that. Continuous GPS 64 h. GPS with music 22 h.

BGarmin Forerunner 55

Mode	With solar	Hours (h)
Smartwatch	No	336
GPS	No	20

Source1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Specs: Smartwatch Mode up to 2 weeks (336 h), GPS mode up to 20 hours. The manual page 49 states up to 14 days with smart notifications and wrist heart rate.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 49: up to 14 days for smartwatch mode with smart notifications and wrist heart rate (336 h). Up to 20 hr in GPS mode.

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.

600h=CalculatedFrom Claimed battery life

336h=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.

240h=CalculatedFrom Claimed battery life

Not available

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.

64h=CalculatedFrom Claimed battery life

20h=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 pins4Owner's manualteamplush.by/wp-content/uploads/2026/03/ebee4a37f9738b85defbef6b93194aef44753e63015757d5d56ccbd7659e6d1e_optim_cropped.pdfRead 14 October 2026Charging the Watch: the metal contacts on the back of the watch fit the charging base. The page calls it a magnetic charging head. Conductive pins, not Qi.

Proprietary plug2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 48: the watch comes with a proprietary charging cable that plugs into the charging port on the watch.

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

Input DC 5 V, 500 mA max. The product manual recommends a power adapter with a charging current of 1 A or more. The USB-C cable is not included.4Owner's manualteamplush.by/wp-content/uploads/2026/03/ebee4a37f9738b85defbef6b93194aef44753e63015757d5d56ccbd7659e6d1e_optim_cropped.pdfRead 14 October 2026Basic Parameters: Input DC 5 V 500 mA MAX. Charging the Watch note 2 recommends a power adapter with 1 A or more. The US page says the USB-C cable is not included.

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

Not available

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

Not available

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.

120min9Spec databasethe5krunner.com/specs/amazfit/active-maxRead 14 October 2026Charging row: approximately 2 hours for a full charge. Approximate, charger not stated. The page lists NFC for EMEA only and no ANT+.

120min2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 48: charging a fully depleted battery takes up to two hours. Published as an upper bound. The page asks for an adapter of at least 5 W.

Measured

None of 4 known

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

Not available

Strap

4 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/active-maxRead 14 October 2026Strap Attachment 22mm in the model comparison and Strap Width: 22mm in the specs.

20mm1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 20262Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 49: compatible with 20 mm wide, standard, quick-release bands.

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

Not available

Yes1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 20262Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Page 49: slide the quick-release pin on the spring bar to remove the band.

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

22 mm strap attachment1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Compare table: Strap Attachment 22mm. The product manual shows spring-bar strap attachment. The lug screws are not strap-release controls.

20 mm wide, standard, quick-release bands2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026

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/active-maxRead 14 October 2026Strap Materials: Silicone. Classic pin buckle.

Silicone1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026

Strap

Not available

Not available

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 Active Max

Not available

BGarmin Forerunner 55

Wrist (min) (mm)	Wrist (max) (mm)
126	203

Source1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Specs: fits wrists with a circumference of 126-203 mm. Overall fit of the supplied band, no size name.

Regulatory

1 of 3 differ

FCC ID

Not available

IPH-0416217Regulatory filingstatic.garmin.com/pumac/Forerunner%2055.pdfRead 7 October 2026Current maker-hosted regulatory bundle begins with February 2026 Chile declaration. Rogers Labs A04162 test report 210120 cover is bundle PDF page 2 and explicitly lists FCC ID IPH-04162 and IC 1792A-04162. Hardware A04162 matches the manual. ANT/BLE radios only, no core Bluetooth version inferred.

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

ISED Canada: 1792A-04162, EU RED 2014/53/EU Declaration of Conformity, EU RoHS 2011/65/EU Declaration of Conformity, Chile SUBTEL Resolution 737 compliance declaration (2026)17Regulatory filingstatic.garmin.com/pumac/Forerunner%2055.pdfRead 7 October 2026Bundle PDF page 2 Rogers Labs report cover lists Canada IC 1792A-04162. EU directives are independently stated in exact A04162 maker DoC revised 14 August 2025. Bundle PDF page 1 declares Chile SUBTEL Resolution 737 compliance 2026 for Forerunner 55/A04162. Radio/environmental compliance, not medical clearance.18Maker spec sheet (PDF)static.garmin.com/pumac/Forerunner%2055_DoC-EU.pdfRead 7 October 2026English first page, model A04162, Forerunner 55. Application of Council Directive: 2011/65/EU. 2014/53/EU. Declaration revised 14 August 2025. These are RoHS and RED compliance, not medical clearance.

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/active-maxRead 14 October 2026Packing List. The page notes the USB-C charging cable is not included.

Forerunner 55, Charging cable, Documentation1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026In The Box tab, verbatim.

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/active-maxRead 14 October 2026Packing list has the magnetic charging head but no mains or USB power adapter.

No1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026In The Box lists the watch, a charging cable and documentation. No power adapter.

Links

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Product page

us.amazfit.com/products/active-max1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

www.garmin.com.sg/products/wearables/forerunner-55-black1Maker product pagegarmin.com.sg/products/wearables/forerunner-55-blackRead 6 October 2026Garmin Singapore product page, part number 010-02562-50. The Garmin US product page no longer loads (404 on the access date). Specs, In The Box and the colour selector were read from the page HTML.

Spec sheet

us.amazfit.com/products/active-max1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

shop.meinetelewelt.at/public/files/pdf/1.75.479.10150-Datenblatt.pdf9Maker spec sheet (PDF)shop.meinetelewelt.at/public/files/pdf/1.75.479.10150-Datenblatt.pdfRead 7 October 2026Original Garmin product datasheet distributed by a retailer. PDF created 2 June 2021. The Forerunner 55 column is distinct from the 45, 245 Music and 745 columns. Some dimensional cells are rounded or mistyped, so existing exact manual dimensions are retained. Published text: DATENBLATT FORERUNNER 55

Manual

support.amazfit.com/en/amazfit_active_max/files/user-manual.pdf.pdf5Owner's manualsupport.amazfit.com/en/amazfit_active_max/files/user-manual.pdf.pdfRead 14 October 2026

www8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdf2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-3A791586-B59F-4B37-B9C5-5A41F8C6BE0B/EN-US/Forerunner_55_OM_EN-US.pdfRead 6 October 2026Forerunner 55 Owner's Manual, version 9, January 2026. Printed page numbers in notes.

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.

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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.

1year1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026US store page lists 1 Year Warranty. The product manual states a 12-month manufacturing-defect warranty or the period required by local consumer law. US market only.

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