Smartwatches / Compare

Amazfit Cheetah 2 Pro vs Polar Street X

A

Product A: Amazfit

Cheetah 2 Pro

90 of 150 known

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B

Product B: Polar

Street X

79 of 150 known

Change Polar Street X

Compare the Amazfit Cheetah 2 Pro with

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All 150 fields

Every value links to where we found it.

Only differences

AAmazfit Cheetah 2 Pro

BPolar Street X

General

6 of 10 differ

Series

Cheetah1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026

Street1Maker product pagepolar.com/en/street-xRead 15 October 2026Polar files it under Urban Sports Watches. The Polar guide calls the Pacer and Street watches one line.

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

A2564, W2564GL1N, CHEETAH2P-C12090050041Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026US store SKU W2564GL1N. A2564 is the model number on the Amazon US listing. CHEETAH2P-C1209005004 is the German store SKU. The shared manual says A2563/A2564, so one of them may be a regional version.3Maker product pagede.amazfit.com/products/cheetah-2-proRead 16 October 2026German store SKU CHEETAH2P-C1209005004, Titanium.9Press articletechstoriesindia.com/amazfit-cheetah-2-pro-48mm-amazon-usRead 16 October 2026Titled Amazfit Cheetah 2 Pro 48mm (A2564) on Amazon US.

6J, 900116713, 900116714, 9001167151Maker product pagepolar.com/en/street-xRead 15 October 2026Store feed SKUs 900116713 (Night Black), 900116714 (Forest Green) and 900116715 (Snow White). The manual and the regulatory sheet give the model 6J.3Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/technical-specifications.htmRead 15 October 2026Model 6J.

GTIN / EAN

850082990177, 69725961099211Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Store barcode 850082990177 for the US SKU. The German store barcode is 6972596109921.2Maker product pageeu.amazfit.com/products/cheetah-2-proRead 16 October 2026Store variant barcode 6972596109921 for SKU CHEETAH2P-C1209005004.9Press articletechstoriesindia.com/amazfit-cheetah-2-pro-48mm-amazon-usRead 16 October 2026UPC 850082990177, the same as the US store barcode.

725882070766, 725882070773, 7258820707801Maker product pagepolar.com/en/street-xRead 15 October 2026Store feed gtin12: 725882070766 Night Black, 725882070773 Forest Green and 725882070780 Snow White.

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

16 April 20267Press articlenetzwelt.de/news/252991-neue-amazfit-cheetah-2-pro-smartwatch-laufen-profis-rekorden.htmlRead 16 October 2026Published 16 April 2026.9Press articletechstoriesindia.com/amazfit-cheetah-2-pro-48mm-amazon-usRead 16 October 2026Published 16 April 2026.

25 March 202617Press releasepolar.com/en/media-room/polar-debuts-street-xRead 15 October 2026Press release dated 25 March 2026 from Kempele, Finland.

Status

Available1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026In stock at $449.99 on the access date. Tagged Best Sellers.

Available1Maker product pagepolar.com/en/street-xRead 15 October 2026Global store: Buy now and in stock for three colours.

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.

$449.991Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Regular price $449.99 at the US store with no compare-at price. US prices exclude sales tax.8Spec databasethe5krunner.com/specs/amazfit/cheetah-2-proRead 16 October 2026Launch price USD 449.99.9Press articletechstoriesindia.com/amazfit-cheetah-2-pro-48mm-amazon-usRead 16 October 2026$449.99 at the pre-order launch on 16 April 2026 on Amazon US.

$249.917Press releasepolar.com/en/media-room/polar-debuts-street-xRead 15 October 2026USD 249.90, excluding tax.

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.

€449.93Maker product pagede.amazfit.com/products/cheetah-2-proRead 16 October 2026German store price 449.90 EUR with no compare-at price. VAT is included. Prefer the German maker price over other euro countries.7Press articlenetzwelt.de/news/252991-neue-amazfit-cheetah-2-pro-smartwatch-laufen-profis-rekorden.htmlRead 16 October 2026Price 449.90 EUR. German report, VAT included.8Spec databasethe5krunner.com/specs/amazfit/cheetah-2-proRead 16 October 2026

€249.917Press releasepolar.com/en/media-room/polar-debuts-street-xRead 15 October 2026EUR 249.90 including VAT where applicable. GBP 219.00.

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/cheetah-2-proRead 16 October 2026US store and the German and EU stores.2Maker product pageeu.amazfit.com/products/cheetah-2-proRead 16 October 2026EU and UK stores sell SKU CHEETAH2P-C1209005004.

US, DE2Maker product pagepolar.com/us-en/street-xRead 15 October 2026The US store lists the same three colours as in stock. Its current price is 249.99 USD, which differs from the launch price of 249.90 USD and is not used.

ColoursiThe maker's own colour names

Titanium1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Spec table colour: Titanium.

Night Black, Snow White, Forest Green1Maker product pagepolar.com/en/street-xRead 15 October 2026Colour options: Night Black, Snow White, Forest Green.

Segment

Sport1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Sold as a running watch for marathon preparation. The page compares it with the Cheetah 2 Ultra, which is the trail model.

Sport1Maker product pagepolar.com/en/street-xRead 15 October 2026Polar calls it an urban sports watch for hybrid athletes who train, work and live in the city. The store lists it in the Performance Series.

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.

48mm1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Case diameter (industry standard measurement) 48 x 48 mm.

45mm1Maker product pagepolar.com/en/street-xRead 15 October 2026One size. Tech specs: width 45 mm and height 45 mm.

Case shape

Round1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Case diameter is given as 48 x 48 mm and the Zepp device list shows a round screen at 466 x 466.6Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 16 October 2026Cheetah 2 Pro row: screen shape Round, 466 x 466.

Round1Maker product pagepolar.com/en/street-xRead 15 October 2026Round case with a round AMOLED 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.

Titanium1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Compare table: Grade 5 titanium frame and case, aluminum alloy buttons, plastic bezel. The housing body is titanium.

Fibre-reinforced polymer1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: case material and bezel material Bio-based plastic. The launch release says reinforced polymer body. The manual lists PA11+8GF (glass-fibre reinforced polyamide 11) among the device materials. Stored as fibre-reinforced polymer.3Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/technical-specifications.htmRead 15 October 2026Device materials list PA11+8GF, a glass-fibre reinforced polyamide.

Case material (as published)

Grade 5 titanium frame and case, aluminum alloy buttons, plastic bezel1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026

Bio-based plastic1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: Case material Bio-based plastic.

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.

Height48Width48Thickness13.2mm(1.9 × 1.9 × 0.5 in)1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Case diameter 48 x 48 mm. Thickness 13.2 mm excludes the heart rate sensor and 15.6 mm includes it. The excluded value follows the other Amazfit entries.

Height45Width45Thickness13.8mm(1.8 × 1.8 × 0.5 in)1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: width 45 mm, height 45 mm, thickness 13.8 mm.

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

45.6g(1.6 oz)1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Weight (without strap): 45.6 g.

28g(1 oz)1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: total weight without wristband 28 g.18Maker product pagepolar.com/en/guide/polar-street-x-vs-polar-pacer-proRead 15 October 2026Comparison table: 48 g, 28 g without band.

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

48g(1.7 oz)1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: total weight 48 g. This is with the POLAR Street Wristband, 22mm that comes in the box.

Durability

3 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/cheetah-2-proRead 16 October 2026Water-Resistance Grade 5 ATM. Note 10: static pressure equal to 50 m. Not for snorkeling, diving or the sauna.5Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/imgs/electronic_manual.pdfRead 16 October 2026Basic Parameters: water resistance rating 5 ATM.

5ATM1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: water resistance WR50. The manual says 50 m, suitable for swimming.3Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/technical-specifications.htmRead 15 October 2026Water resistance 50 m (suitable for swimming).

Water resistance standard

ISO 22810:20101Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Note 10: rating according to ISO 22810:2010, tested by SGS.

ISO 228103Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/technical-specifications.htmRead 15 October 2026The water resistance section says Polar tests to ISO 22810 or IEC 60529. The 20, 30 and 50 m class cites ISO 22810.

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

Yes1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: tested against military standard MIL-STD-810H. The tested methods are not listed.

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°C5Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/imgs/electronic_manual.pdfRead 16 October 2026Basic Parameters: working temperature 0 to 45 C.

Min-20Max50°C1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: operation temperature -20 C to 50 C.3Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/technical-specifications.htmRead 15 October 2026Operating temperature -20 C to +50 C.

Display

6 of 14 differ

Display type

OLED1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Display > Material: AMOLED.

OLED1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: display type AMOLED.

Display type (as published)

AMOLED1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026

AMOLED1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: display type AMOLED.

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

1.32in(3.4 cm)1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Display Size 1.32 inch, the diameter of the round screen. The sapphire cover is 43.8 mm across.

1.28in(3.3 cm)1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: display size 1.28 inch.

Resolution

466 × 466px1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 20266Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 16 October 2026Row: 466 x 466.

416 × 416px1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: display resolution 416 x 416.

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

353ppi1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026PPI 353 as published.

Not available

Display area

Not available

Not available

Touchscreen

Yes1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Touchscreen row: sapphire glass. The manual lists tap and swipe gestures.4Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/files/user-manual.pdf.pdfRead 16 October 2026

Yes1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: touch screen Yes.5Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/button-functions.htmRead 15 October 2026Color touch display: swipe and tap. It is disabled during training.

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/cheetah-2-proRead 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

Yes4Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/files/user-manual.pdf.pdfRead 16 October 2026Always On Display under Settings > Display. It reduces battery life.

Yes1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: always on display Yes. The battery support page says it is off by default.14Maker product pagesupport.polar.com/en/what-is-the-battery-life-of-street-xRead 15 October 2026Always on display is off by default in Street X.

Display cover

Sapphire1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026

Gorilla Glass1Maker product pagepolar.com/en/street-xRead 15 October 2026Description: 1.28 inch AMOLED touchscreen with Gorilla Glass 3.

Display cover (as published)

Sapphire glass1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Screen Material: Sapphire Glass.

Corning Gorilla Glass 3 (AF + DLC coating)1Maker product pagepolar.com/en/street-xRead 15 October 2026Manual tech spec: Corning Gorilla Glass 3 (AF + DLC coating).3Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/technical-specifications.htmRead 15 October 2026Watch materials: Corning Gorilla Glass 3 (AF + DLC coating), PA11+8GF, aluminum, stainless steel, PMMA. Wristband: silicone with an aluminum buckle.

Platform

7 of 15 differ

Platform

Proprietary6Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 16 October 2026The device runs Zepp OS, the maker own operating system.

Proprietary1Maker product pagepolar.com/en/street-xRead 15 October 2026Polar own firmware. The Polar comparison guide says it runs the same OS as the Vantage V3 and Grit X2 Pro.

OS at launch

Zepp OS 5.06Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 16 October 2026Row lists Zepp OS version 5.0. A German launch report also says Zepp OS 5.7Press articlenetzwelt.de/news/252991-neue-amazfit-cheetah-2-pro-smartwatch-laufen-profis-rekorden.htmlRead 16 October 2026Lists Zepp OS 5.

Not available

Software

Not available

Not available

Latest OS

Zepp OS 5.06Maker 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.

Not available

Works with

iOS, Android1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026

iOS, Android15Maker product pagesupport.polar.com/ie-en/polar-flow-app-and-compatible-devicesRead 15 October 2026Street X works with iOS and Android phones through the Polar Flow app.

Phone requirement

Android 7.0 and above, iOS 15.0 and above, with the Zepp app5Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/imgs/electronic_manual.pdfRead 16 October 2026Device requirements: Android 7.0 or iOS 15.0 or above. The store page says iOS 14.0 and the manual wins.

iOS 17 or later, or Android 8 or later with Bluetooth 4.0 capability, running the Polar Flow app15Maker product pagesupport.polar.com/ie-en/polar-flow-app-and-compatible-devicesRead 15 October 2026Street X: iOS mobile devices with iOS 17 or later. Android mobile devices with Bluetooth 4.0 capability and Android 8 or later.

App store

Yes4Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/files/user-manual.pdf.pdfRead 16 October 2026Mini App installation: download apps from the app store in the Zepp app.

Not available

Voice assistants

Zepp Flow1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Zepp Flow, select countries and regions. Note 8 lists the languages.

Not available

Chipset

Not available

Not available

Process

Not available

Not available

CPU cores

Not available

Not available

CPU configuration

AAmazfit Cheetah 2 Pro

Not available

BPolar Street X

Max clock (GHz)
0.275

Source1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: CPU speed 275 MHz. Core count and type are not stated.

Max CPU clock

Not available

0.275GHz=CalculatedFrom CPU configuration

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.

32GB1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Storage: 32GB. Available space is lower and is not published.

32 MB1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: storage 32 MB, stored as 0.032 GB. The page also lists memory 5 MB, which is not labelled RAM and is not stored.

Health sensors

3 of 8 differ

Heart rate sensor

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

Polar Precision Prime optical heart rate sensor (OHR GEN 3.5)1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: Precision Prime, OHR GEN 3.5.3Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/technical-specifications.htmRead 15 October 2026Sensors: Precision Prime, Skin Temp GEN 1, OHR GEN 3.5.

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

No10Spec databasegadgetsandwearables.com/technical-specs/amazfit-cheetah-2-proRead 16 October 2026ECG is not listed. The maker sensor list names no electrical sensor. Electrical heart rate is listed as absent.

No1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: ECG none.

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

Yes1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 202624-hour and manual blood-oxygen saturation. Not a medical device.

No1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: SpO2 none.

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

Yes1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 202624H Monitoring lists skin temperature (thermometer). The Movement sensor list also has a temperature sensor.

Yes1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: Skin Temp GEN 1. Nightly skin temperature feature.

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

Not available

Not available

Body composition sensor

Not available

Not available

Skin conductance (EDA)

No10Spec databasegadgetsandwearables.com/technical-specs/amazfit-cheetah-2-proRead 16 October 2026Galvanic skin response listed as absent.

Not available

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

0 of 9 differ

Accelerometer

Yes1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026

Yes1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: accelerometer Yes.

Accelerometer range

Not available

Not available

Gyroscope

Yes1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Sensors > Movement: acceleration, gyroscope, ambient light, geomagnetic, temperature, barometric altimeter.

Yes1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: gyroscope Yes.

Barometric altimeter

Yes1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026

Yes1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: barometer Yes.

Compass

Yes1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026The geomagnetic sensor is listed. The manual control center offers a Compass control. One spec database lists no magnetic compass.4Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/files/user-manual.pdf.pdfRead 16 October 2026Control center can add Barometer and Compass.

Yes1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: magnetometer compass Yes.

Ambient light sensor

Yes1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026

Yes1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: ambient light sensor Yes.

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

2 of 5 differ

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/cheetah-2-proRead 16 October 202624-hour heart rate, blood oxygen, stress and skin temperature, abnormally high and low heart rate reminders, sleep HRV, sleep stages including REM, HybridCharge with BioCharge, and menstrual cycle tracking. The FAQ calls BioCharge a readiness indicator, so it is stored as readiness score. Not a medical device.4Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/files/user-manual.pdf.pdfRead 16 October 2026BioCharge, sleep stages and sleep score, heart rate alerts and cycle tracking are described.

Continuous heart rate, Heart rate variability, Sleep tracking, Sleep stages1Maker product pagepolar.com/en/street-xRead 15 October 2026Features: continuous heart rate, nightly sleep stages (Sleep Plus Stages), Nightly Recharge, SleepWise. HRV is listed under heart rate. The Daily Readiness card and SleepWise give an alertness forecast, not a readiness score, so readiness_score is not stored. No stress score is listed. Not a medical device.4Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/introduction.htmRead 15 October 2026Introduction: Sleep Plus Stages, Nightly Recharge, SleepWise, continuous heart rate.

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, Running dynamics, Running power, Pool swim, Open water swim, Strength rep counting, Interval workouts, Route navigation, Turn-by-turn navigation, Trackback1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Smarter Metrics: VO2 Max (note 6, outdoor running modes only), Training Load and Training Effect. Advanced Running Support lists running power, ground contact time and lactate threshold. Heart rate recovery. Pool and open water swimming. Strength training with recognition of 25 exercises. Interval training. Offline maps with turn-by-turn directions and routes. Running dynamics is stored because ground contact time is named.4Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/files/user-manual.pdf.pdfRead 16 October 2026Automatic workout identification, Backtrack to the start, track and turn-by-turn navigation, lactate threshold test, VO2 max, training load and total recovery time are described.

VO2 max, Training load, Recovery advice, Running power, Pool swim, Open water swim, Interval workouts, Route navigation, Turn-by-turn navigation, Trackback, Climb detection1Maker product pagepolar.com/en/street-xRead 15 October 2026Features and cards: Running Performance Test (VO2max), Training Load Pro, Recovery Pro, wrist-based running power, swimming metrics, interval timers and phased training targets, route guidance, turn-by-turn route guidance, Track Back, Back to Start. Hill Splitter detects uphills and downhills automatically (manual). The manual has separate pool and open water swimming sections.4Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/introduction.htmRead 15 October 2026Introduction: Route Guidance, Komoot routes, Track back, Back to start, Running Performance Test with VO2max, Walking test, Training Load Pro, Recovery Pro, running power, swimming metrics with distance and strokes also in open water, Hill Splitter.9Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/swimming-metrics.htmRead 15 October 2026Separate sections for pool swimming (distance, pace, strokes, SWOLF) and open water swimming (distance, pace, stroke rate for freestyle and route).10Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/hill-splitter.htmRead 15 October 2026Hill Splitter automatically detects all uphills and downhills from GPS speed, distance and barometric altitude. It needs a 1 second GPS recording rate. Stored as climb detection.13Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/track-back-and-back-to-start.htmRead 15 October 2026Track back guides you back to the start via the same route you came. Back to start shows the direction by beeline.

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/cheetah-2-proRead 16 October 2026Peripheral list: heart rate belt, running and cycling power meters, cycling speedometer and cadence meter. BLE devices only (note 7).

Heart rate strap, Power meter, Speed and cadence8Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/compatible-sensors.htmRead 15 October 2026Compatible Bluetooth sensors: Polar Verity Sense, OH1, H10 and H9 heart rate sensors, Polar speed sensor and cadence sensor, and third-party power sensors.

Safety

2 of 6 differ

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

No10Spec databasegadgetsandwearables.com/technical-specs/amazfit-cheetah-2-proRead 16 October 2026Fall detection listed as not supported.

Not available

Car crash detection

Not available

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.

No10Spec databasegadgetsandwearables.com/technical-specs/amazfit-cheetah-2-proRead 16 October 2026Emergency SOS listed as not supported.

Not available

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.

Yes1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Flashlight: support, red and white. The text calls it dual mode LED illumination with Boost and SOS flash modes.4Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/files/user-manual.pdf.pdfRead 16 October 2026Hold UP for 2 seconds to turn the flashlight on or off. The control center has an SOS flashlight mode, which is a flashing light and not an emergency alert.

Yes1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: front LED light Yes. Built-in LED flashlight with red light mode.11Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/flashlight.htmRead 15 October 2026Integrated LED flashlight with adjustable white light and a red light mode.

Positioning

3 of 3 differ

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

Not available

GPS, Galileo, BeiDou, QZSS1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs, Geo location: GPS, Galileo, BeiDou and QZSS Yes. GLONASS is not listed.18Maker product pagepolar.com/en/guide/polar-street-x-vs-polar-pacer-proRead 15 October 2026Comparison table: GPS constellations GPS, Galileo, BeiDou, QZSS for Street X. GLONASS is not named.

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

Yes1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Positioning: dual-band positioning and 6 satellite positioning systems. The systems are not named, so positioning is left out.5Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/imgs/electronic_manual.pdfRead 16 October 2026Basic Parameters: GNSS receive ranges 1559-1610 MHz and 1164-1215 MHz. The second range is a lower band, which matches the dual-band claim.

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/cheetah-2-proRead 16 October 2026Downloadable offline maps with contour lines. Note 3: imports OSM map files and a route file is needed for navigation.

No19Spec databasethe5krunner.com/specs/polar/street-xRead 15 October 2026No onboard maps. Route guidance uses planned routes and breadcrumbs.

Connectivity

8 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/cheetah-2-proRead 16 October 2026Connection: Bluetooth, BLE 5.3, Wi-Fi 2.4GHz.

Yes1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: Bluetooth technology Bluetooth LE.

Bluetooth version

5.35Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/imgs/electronic_manual.pdfRead 16 October 2026Basic Parameters: Bluetooth version V5.3.

Not available

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

Yes1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Connection: Wi-Fi 2.4GHz.5Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/imgs/electronic_manual.pdfRead 16 October 2026Basic Parameters: Wi-Fi 2.4 GHz 802.11 b/g/n, output below 18 dBm.8Spec databasethe5krunner.com/specs/amazfit/cheetah-2-proRead 16 October 2026Connectivity: Bluetooth 5.3 BLE, Wi-Fi 2.4GHz, NFC (Zepp Pay).

No1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs, Connectivity lists Bluetooth LE and the USB cable only.

Wi-Fi standard

Wi-Fi 41Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026802.11 b/g/n is given in the e-manual. That is Wi-Fi 4.5Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/imgs/electronic_manual.pdfRead 16 October 2026802.11 b/g/n, the Wi-Fi 4 generation.

Not available

Wi-Fi bands

2.4 GHz1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Connection: Wi-Fi 2.4GHz.5Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/imgs/electronic_manual.pdfRead 16 October 2026Wi-Fi frequency 2400-2483.5 MHz.

Not available

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

No10Spec databasegadgetsandwearables.com/technical-specs/amazfit-cheetah-2-proRead 16 October 2026No cellular. The maker Connection row lists Bluetooth and Wi-Fi only.

No1Maker product pagepolar.com/en/street-xRead 15 October 2026Connectivity lists Bluetooth LE and the USB cable only. No cellular radio 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

No19Spec databasethe5krunner.com/specs/polar/street-xRead 15 October 2026NFC not listed. The page says the watch has no contactless payment.

Contactless payments

Yes2Maker product pageeu.amazfit.com/products/cheetah-2-proRead 16 October 2026EU store text: with NFC technology, Zepp Pay binds up to eight bank cards for contactless payment. Note 9: Zepp Pay runs with Curve and participating banks in 31 European countries and the UK. The US page does not list it.8Spec databasethe5krunner.com/specs/amazfit/cheetah-2-proRead 16 October 2026NFC (Zepp Pay).

No19Spec databasethe5krunner.com/specs/polar/street-xRead 15 October 2026No contactless payment.

Payment services

Zepp Pay2Maker product pageeu.amazfit.com/products/cheetah-2-proRead 16 October 2026Zepp Pay.

Not available

Ultra-wideband

No10Spec databasegadgetsandwearables.com/technical-specs/amazfit-cheetah-2-proRead 16 October 2026No UWB.

Not available

Satellite

None10Spec databasegadgetsandwearables.com/technical-specs/amazfit-cheetah-2-proRead 16 October 2026Satellite SOS listed as not supported.

None1Maker product pagepolar.com/en/street-xRead 15 October 2026Connectivity lists Bluetooth LE and the USB cable only. No satellite link is listed.

ANT+

No1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Note 7: peripherals connect over BLE only. ANT+ is not listed.

No19Spec databasethe5krunner.com/specs/polar/street-xRead 15 October 2026ANT+ not listed. Connectivity is Bluetooth LE.

Audio

3 of 4 differ

Speaker

Yes1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Other: mic and speaker supported.

Not available

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/cheetah-2-proRead 16 October 2026Compare table: Bluetooth Calls supported. The watch has no cellular radio, so calls need the paired phone.

Not available

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/cheetah-2-proRead 16 October 202632GB storage and a manual chapter that plays stored mp3 files on the watch. GPS plus music battery claim also exists.4Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/files/user-manual.pdf.pdfRead 16 October 2026Music player: plays local mp3 music stored in the watch through the watch speaker or Bluetooth devices.8Spec databasethe5krunner.com/specs/amazfit/cheetah-2-proRead 16 October 202632GB with onboard music storage and playback.

No19Spec databasethe5krunner.com/specs/polar/street-xRead 15 October 2026No music storage.

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.

41Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Buttons: 4.5Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/imgs/electronic_manual.pdfRead 16 October 2026About the Watch shows Up, Select, Down and Power/Back buttons.6Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 16 October 2026Row: 4 physical keys.

55Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/button-functions.htmRead 15 October 2026Your watch has five buttons: CUSTOM (LIGHT), BACK, OK, UP and DOWN. The touch display adds touch control.

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

UP, SELECT, DOWN, BACK / Power4Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/files/user-manual.pdf.pdfRead 16 October 2026UP button, SELECT button (upper right) and BACK button (lower right) in the gestures table. The e-manual names the fourth key Down, and Power/Back for the lower right key.5Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/imgs/electronic_manual.pdfRead 16 October 2026About the Watch: Up button, Select button, Down button, Power/Back button.

LIGHT (custom button), BACK, OK, UP, DOWN5Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/button-functions.htmRead 15 October 2026Button functions: CUSTOM BUTTON (turns the flashlight on or off by default), BACK, OK, UP/DOWN.

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

None4Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/files/user-manual.pdf.pdfRead 16 October 2026Controls are four buttons and the touchscreen. No crown is described.

None5Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/button-functions.htmRead 15 October 2026No crown is described. Controls are five buttons and the touch display.

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 screen4Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/files/user-manual.pdf.pdfRead 16 October 2026Gestures table: cover the screen to turn it off. Raise-to-wake is part of the maker battery workload on the store page.

Not available

Battery and charging

6 of 13 differ

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

540mAh1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Battery Capacity 540 mAh (rated value).

385mAh1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: battery capacity 385 mAh, Li-Pol.3Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/technical-specifications.htmRead 15 October 2026385 mAh Li-pol rechargeable battery, replaceable at Polar Central Service.

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 Cheetah 2 Pro

Mode	With solar	Hours (h)
Smartwatch	No	480
Heavy use	No	240
Always-on	No	192
GPS, dual-band	No	31
GPS, always-on display	No	26
GPS, dual-band with music	No	15
GPS, power saving	No	69
Extended GPS workout	No	99

Source1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Typical use up to 20 days, heavy use up to 10 days, AOD mode up to 8 days (heavy scenario with smart always-on display), accurate GPS up to 31 h (dual-band, all systems, heart rate on), GPS plus AOD 26 h, GPS plus music 15 h (dual-band, all systems, Bluetooth headphones), power saving GPS 69 h (single-band, background services off) and extended battery life GPS 99 h (outdoor walking and hiking only). Days converted exactly to hours. Launch coverage said 29 h of GPS, and the current maker table says 31 h. The maker table wins. Note 1 gives the workloads.

BPolar Street X

Mode	With solar	Hours (h)
Smartwatch	No	240
GPS	No	42
Max battery GPS	No	170

Source1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: performance training mode 42 h, eco training mode 170 h, smartwatch mode 10 d. The page text and the launch release say 43 h for the performance mode, which conflicts with the 42 h in the tech specs and the manual. The manual figure is stored.3Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/technical-specifications.htmRead 15 October 2026Performance training mode up to 42 h (optical heart rate on, GPS recording every second). Eco training mode up to 170 h (GPS every 2 minutes, optical heart rate off). Smartwatch mode up to 10 days with continuous heart rate and phone notifications on. 10 days is 240 h.14Maker product pagesupport.polar.com/en/what-is-the-battery-life-of-street-xRead 15 October 2026Performance up to 42 h: optical heart rate on, GPS every 1 second, always-on display off. The scenario text says Dual-Frequency GPS ON, while the product page never claims dual-frequency GNSS and the5krunner says single-frequency, so the row is stored as plain GPS. Eco up to 170 h: optical heart rate off, single-frequency GPS every 2 minutes. Smartwatch up to 10 days with phone notifications on, always-on display off and Do Not Disturb 8 h at night. Stored eco row as the maximum-saving GPS mode, like the Vantage V3 file.

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

240h=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.

192h=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.

Not available

42h=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/cheetah-2-proRead 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 pins1Maker product pagepolar.com/en/street-xRead 15 October 2026Tech specs: USB cable Proprietary / USB-C. The cable snaps on magnetically (manual).

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.5Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/imgs/electronic_manual.pdfRead 16 October 2026Charging the Watch: use the supplied charging puck on a Type-C cable. An adapter with 1 A or more is recommended.

Charge with the included Polar Charge 2.0 cable, which snaps on magnetically. A USB power adapter is not included. Polar asks for an adapter marked output 5 Vdc that provides at least 500 mA and has an approval mark such as LPS, UL listed or CE. The watch can charge during training. An optional charge limit of 80% is in the battery settings.6Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/batteries.htmRead 15 October 2026Charging the battery: custom cable snaps in magnetically. A USB power adapter is not included. Adapter marked output 5 Vdc, at least 500 mA, LPS, UL listed or CE. Charging during training is possible. Charge limit 80% in Settings > General settings > Battery.

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.

Not available

Not available

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.

20mm1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Compare table: strap attachment 20 mm. Strap > Width: 20 mm.

22mm7Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/changeable-wristband.htmRead 15 October 2026Compatible with standard 22 mm wristbands, no adapters needed.

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

No4Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/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.5Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/imgs/electronic_manual.pdfRead 16 October 2026Same spring bar instruction.

Yes7Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/changeable-wristband.htmRead 15 October 2026To detach a band, pull the quick-release knob inwards.

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

Spring bar strap attachment, 20 mm strap width5Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/imgs/electronic_manual.pdfRead 16 October 2026Assembling the strap: align the strap pin with the lug hole and press the spring bar.

Standard 22 mm spring bars with a quick-release knob. No adapters needed7Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/changeable-wristband.htmRead 15 October 2026Standard 22 mm spring bars. Any band that uses 22 mm spring bars fits.

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/cheetah-2-proRead 16 October 2026Strap > Materials: Silicone.

Silicone3Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/technical-specifications.htmRead 15 October 2026Wristband: silicone, aluminum buckle, stainless steel spring bars.

Strap

Standard silicone strap1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026The store names no strap model. It lists one silicone strap.

POLAR Street Wristband, 22mm1Maker product pagepolar.com/en/street-xRead 15 October 2026What's included: POLAR Street Wristband, 22mm.

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

Not available

Not available

Regulatory

0 of 3 differ

FCC ID

Not available

INW6J16Regulatory filingsupport.polar.com/e_manuals/Regulatory_information/enote-rf-street-x.pdfRead 15 October 2026Model number 6J, FCC ID INW6J, IC 6248A-6J.

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

Not available

In the box

1 of 2 differ

In the box

Smartwatch (including standard strap), Magnetic charging head (no cable), Instruction manual1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026Packing List: smartwatch (including standard strap), magnetic charging head (no cable), instruction manual.

POLAR Street X, POLAR Street Wristband, 22mm, Polar Charge 2.01Maker product pagepolar.com/en/street-xRead 15 October 2026What's included: POLAR Street X, POLAR Street Wristband 22 mm, Polar Charge 2.0.

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/cheetah-2-proRead 16 October 2026Only a charging head is supplied. No cable and no mains adapter.

No1Maker product pagepolar.com/en/street-xRead 15 October 2026The box has the watch, the wristband and the Polar Charge 2.0 cable. No power adapter is listed.

Links

Not compared

Product page

us.amazfit.com/products/cheetah-2-pro1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026

www.polar.com/en/street-x1Maker product pagepolar.com/en/street-xRead 15 October 2026The maker's product page.

Spec sheet

us.amazfit.com/products/cheetah-2-pro1Maker product pageus.amazfit.com/products/cheetah-2-proRead 16 October 2026

support.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/technical-specifications.htm3Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/technical-specifications.htmRead 15 October 2026Street X user manual technical specification page.

Manual

support.amazfit.com/en/amazfit_cheetah_2_pro/files/user-manual.pdf.pdf4Owner's manualsupport.amazfit.com/en/amazfit_cheetah_2_pro/files/user-manual.pdf.pdfRead 16 October 2026

support.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/introduction.htm4Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/introduction.htmRead 15 October 2026Polar Street X user manual, introduction.

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

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Warranty

1 of 1 differ

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/cheetah-2-proRead 16 October 2026Store banner: 1 year warranty. This is the US store.

2years12Owner's manualsupport.polar.com/e_manuals/street-x/polar-street-x-user-manual-english/guarantee.htmRead 15 October 2026Limited International Polar Guarantee: two years from the date of purchase. Silicone or plastic wristbands one year.

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