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Amazfit Active 2 (Square) vs CMF Watch 3 Pro

A

Product A: Amazfit

Active 2 (Square)

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B

Product B: CMF

Watch 3 Pro

73 of 150 known

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All 150 fields

Every value links to where we found it.

Only differences

AAmazfit Active 2 (Square)

BCMF Watch 3 Pro

General

6 of 10 differ

Series

Active1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Listed in the Explore other Active models block

CMF Watch5Spec databasegsmarena.com/nothing_cmf_watch_3_pro-14217.phpRead 8 October 2026

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

W2440GL3N, ACITVESBK-C0077035004, A2440, A2434, W2434GL2N1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026US SKU W2440GL3N2Maker product pageeu.amazfit.com/products/active-2-squareRead 15 October 2026EU SKU as the maker prints it: ACITVESBK-C0077035004. Retailer euronics.ie lists the black Active 2 Square as code 146-W2434GL2N, so W2434GL2N is kept as a model number without a variant row9Retailer pageeuronics.ie/products/amazfit-active-2-square-smartwatch-amoled-fitness-lifestyle-watchRead 15 October 2026Product code 146-W2434GL2N for Amazfit Active 2 Square Black. The manual names regulatory models A2434 and A2440

D3992Owner's manualdevice.report/m/8c2f45d7b97f7ec2090e0664e6261cb2da3e796a2be0c7412d067c82e791e69d_optim.pdfRead 8 October 2026

GTIN / EAN

850071618334, 69725961088181Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026US barcode from the Shopify product feed: 8500716183342Maker product pageeu.amazfit.com/products/active-2-squareRead 15 October 2026EU barcode from the Shopify product feed: 6972596108818

Not available

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

January 20255Press releasenasdaq.com/press-release/amazfit-expands-active-2-lineup-new-active-2-square-all-same-features-now-sleekRead 15 October 2026The release says the Active 2 Square debuted at CES 2025. The exact day is not stated

22 July 20256Press articlegsmarena.com/cmf_watch_3_pro_launches_with_bigger_143_screen_longer_battery_life_and_higher_price_tag-news-68721.phpRead 8 October 2026

Status

Available1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026

Available1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

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.

$149.995Press releasenasdaq.com/press-release/amazfit-expands-active-2-lineup-new-active-2-square-all-same-features-now-sleekRead 15 October 2026Priced at USD 149.99. US price excludes tax

$996Press articlegsmarena.com/cmf_watch_3_pro_launches_with_bigger_143_screen_longer_battery_life_and_higher_price_tag-news-68721.phpRead 8 October 2026US launch list price $99. Article distinguishes the initial $79 discount. Tax treatment is not stated.

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.

€149.95Press releasenasdaq.com/press-release/amazfit-expands-active-2-lineup-new-active-2-square-all-same-features-now-sleekRead 15 October 2026Priced at EUR 149.90, as published with VAT. The German Amazfit store lists the same price

€996Press articlegsmarena.com/cmf_watch_3_pro_launches_with_bigger_143_screen_longer_battery_life_and_higher_price_tag-news-68721.phpRead 8 October 2026Published European launch price EUR 99. Tax treatment is not stated.

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/active-2-squareRead 15 October 20262Maker product pageeu.amazfit.com/products/active-2-squareRead 15 October 2026EU store sells it

Not available

ColoursiThe maker's own colour names

Black (with additional red strap), Black Leather1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026US store option Black (with additional red strap)2Maker product pageeu.amazfit.com/products/active-2-squareRead 15 October 2026EU store option Black Leather

Dark Grey1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026Selected reference is Dark Grey, maker store SKU 6974434225312. Other finishes have different thicknesses and are not represented as variants.

Segment

Smartwatch1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Marketed as an everyday health and fitness smartwatch. The sport profile count is stated only as 160+

Smartwatch1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

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.

36.9mm1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Compare block lists a 36.9mm case width. The square case has no diameter, so this is the case width

47mm6Press articlegsmarena.com/cmf_watch_3_pro_launches_with_bigger_143_screen_longer_battery_life_and_higher_price_tag-news-68721.phpRead 8 October 2026

Case shape

Rectangular7Reviewgadgetsandwearables.com/2025/06/17/amazfit-active-2-square-vs-roundRead 15 October 2026Square body in the comparison table. The schema has no square option, so rectangular

Round6Press articlegsmarena.com/cmf_watch_3_pro_launches_with_bigger_143_screen_longer_battery_life_and_higher_price_tag-news-68721.phpRead 8 October 20268Reviewtechradar.com/health-fitness/smartwatches/cmf-watch-3-pro-reviewRead 8 October 2026Design and display section describes the circular display and circular watch design.

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-2-squareRead 15 October 2026

Aluminium5Spec databasegsmarena.com/nothing_cmf_watch_3_pro-14217.phpRead 8 October 2026Build row identifies an aluminium frame. Maker design table identifies the body as metal.

Case material (as published)

Stainless steel bezel, Fiber-reinforced polymer case1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Technical Specifications, Body Material

Metal body1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

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.

Height43.32Width36.9Thickness9mm(1.7 × 1.5 × 0.4 in)1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Dimensions without heart rate base: 43.32 x 36.9 x 9 mm, read as height x width x thickness

Width47Thickness14.4mm(1.9 × 0.6 in)1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026Design table, Dark Grey and Light Green: width 4.7 cm and depth 1.44 cm. The published height of 25.8 cm includes the open strap and is excluded from case height.

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

31.4g(1.1 oz)1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Without strap

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

Not available

Durability

4 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-2-squareRead 15 October 2026Footnote 4: 5 ATM per ISO 22810:2010, SGS report SHES250300481871. Suitable for splashes, snow, showering or swimming

Not available

Water resistance standard

ISO 22810:20101Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Footnote 4

IEC 605291Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

Dust and water rating

Not available

IP681Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026Footnote 12: IP68 under IEC 60529, up to 1.1 m in still clear water for 30 minutes. The maker excludes swimming, hot showers, diving and high-pressure water.

Dive rating

Not available

Not available

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

Not available

Not available

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

Not available

Not available

MIL-STD-810 tests

Not available

Not available

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

Min0Max45°C4Owner's manualsupport.amazfit.com/en/amazfit_active_2%28square%29/imgs/electronic_manual.pdfRead 15 October 2026Basic Parameters, page 5: 0 to 45 degrees C. Model numbers A2434 and A2440 are printed in the same table

Not available

Display

7 of 14 differ

Display type

OLED1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026

OLED1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

Display type (as published)

AMOLED1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026

AMOLED1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 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.

1.75in(4.4 cm)1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026

1.43in(3.6 cm)1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

Resolution

390 × 450px1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026

466 × 466px1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

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

341ppi1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026

326ppi1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

Display area

Not available

Not available

Touchscreen

Yes3Owner's manualsupport.amazfit.com/en/amazfit_active_2%28square%29/files/user-manual.pdf.pdfRead 15 October 2026Basic operations, pages 2-3: tap and swipe on the screen

Yes2Owner's manualdevice.report/m/8c2f45d7b97f7ec2090e0664e6261cb2da3e796a2be0c7412d067c82e791e69d_optim.pdfRead 8 October 2026

Max refresh rateiHighest published display refresh rate in active operation.

Not available

60Hz1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026Display refresh table publishes 60 FPS as the refresh rate.

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.

2,000nits1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Footnote 1: 2,000 nits is not supported if battery life is below 30 percent. Depending on the environment the watch can reach up to 2,000 nits with automatic brightness enabled

670nits1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026Display table: 650 nits typical, up to 670 nits. Screen area and ambient-light conditions are not specified.

Minimum brightness

Not available

Not available

Always-on display

Yes3Owner's manualsupport.amazfit.com/en/amazfit_active_2%28square%29/files/user-manual.pdf.pdfRead 15 October 2026Always On Display section, page 4

Yes1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

Display cover

Sapphire1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026

Other glass1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

Display cover (as published)

Sapphire glass1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Spec row lists a sapphire cover. The page copy names scratch-resistant sapphire glass

Glass1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

Platform

6 of 15 differ

Platform

Proprietary8Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 15 October 2026Zepp OS developer documentation lists the watch as a Zepp OS device

Proprietary8Reviewtechradar.com/health-fitness/smartwatches/cmf-watch-3-pro-reviewRead 8 October 2026Features section identifies proprietary Nothing software.

OS at launch

Zepp OS 5.07Reviewgadgetsandwearables.com/2025/06/17/amazfit-active-2-square-vs-roundRead 15 October 2026The Square comes with ZeppOS 5.0 out of the box. One Russian launch article says 4.5, which contradicts this

Not available

Software

Not available

Not available

Latest OS

Zepp OS 5.08Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 15 October 2026Amazfit Active 2 (Square) row: latest Zepp OS version 5.0. Latest API level 4.2 is separate

Not available

Works with

Android, iOS1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026

iOS, Android1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

Phone requirement

Android 7.0 and above, iOS 15.0 and above1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Supported Devices: Android 7.0 and above, iOS 15.0 and above

Android 6.0 or later, or iOS 13 or later. Uses the Nothing X app.1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

App store

Yes3Owner's manualsupport.amazfit.com/en/amazfit_active_2%28square%29/files/user-manual.pdf.pdfRead 15 October 2026Mini App installation, page 36: download and install more apps in the app store

No9Reviewwareable.com/smartwatches/cmf-watch-3-pro-reviewRead 8 October 2026Smart features section explicitly states there is no third-party app support.

Voice assistants

Zepp Flow1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026

Paired phone voice assistant, ChatGPT1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026Other features table lists Voice Assistant. The ChatGPT section and footnote 15 state ChatGPT integration and require Nothing OS. Most connected functions require the paired smartphone.12Maker product pagesupport.nothing.tech/hc/en-us/articles/37233005379217-How-to-use-ChatGPT-on-my-watchRead 8 October 2026ChatGPT is available only to Nothing phone users. The paired phone needs the ChatGPT app, a logged-in account, microphone permission and a selected conversation voice. Enable ChatGPT through the Nothing X app.

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.

Not available

256 MB5Spec databasegsmarena.com/nothing_cmf_watch_3_pro-14217.phpRead 8 October 2026Internal storage 256 MB, converted exactly to 0.256 decimal GB. User-accessible music storage is not implied.

Health sensors

5 of 8 differ

Heart rate sensor

BioTracker 6.0 PPG biosensor (dual LED, 5PD)1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Sensors, Health: BioTracker 6.0 PPG biometric sensor. The launch release names a dual-LED and 5PD build

Optical heart rate and blood oxygen sensor1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

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-2-squareRead 15 October 2026Electrical heart rate row says No and ECG says No

No10Reviewindianexpress.com/article/technology/tech-reviews/nothing-cmf-watch-3-pro-review-2026-10761542Read 8 October 2026Health and fitness section explicitly states that the model has no ECG. Measurements and paired-earphone claims are not used.

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

Yes1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026

Yes1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

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-2-squareRead 15 October 202624H Monitoring lists skin temperature (thermometer)

No9Reviewwareable.com/smartwatches/cmf-watch-3-pro-reviewRead 8 October 2026Health and sleep tracking section explicitly states there is no built-in temperature sensor.

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

None6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-2-squareRead 15 October 2026Blood pressure row says No

Not available

Body composition sensor

No6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-2-squareRead 15 October 2026Body composition row says No

Not available

Skin conductance (EDA)

No6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-2-squareRead 15 October 2026Galvanic skin response row says No

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

2 of 9 differ

Accelerometer

Yes1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026

Yes1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

Accelerometer range

Not available

Not available

Gyroscope

Yes1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026

Yes1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

Barometric altimeter

Yes1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026

Not available

Compass

Yes3Owner's manualsupport.amazfit.com/en/amazfit_active_2%28square%29/files/user-manual.pdf.pdfRead 15 October 2026Compass app, page 34. The sensor list names a geomagnetic sensor

Not available

Ambient light sensor

Yes1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026

Yes1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 20262Owner's manualdevice.report/m/8c2f45d7b97f7ec2090e0664e6261cb2da3e796a2be0c7412d067c82e791e69d_optim.pdfRead 8 October 2026

Depth gauge

Not available

Not available

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

Not available

Not available

Water temperature sensor

Not available

Not available

Health and fitness

4 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/active-2-squareRead 15 October 202624H heart rate, blood oxygen and stress. Alerts for abnormally high and low heart rate and low blood oxygen. Sleep HRV and sleep stages. Daily readiness score. Menstrual cycle tracking. Not medical devices (footnote 2)

Continuous heart rate, Heart rate alerts, Blood oxygen app, Sleep tracking, Sleep stages, Stress tracking, Cycle tracking3Maker product pagesupport.nothing.tech/hc/en-us/sections/31667497585169-Product-FeatureRead 8 October 2026Health monitoring and Enhanced sleep tracking articles list heart rate monitoring and alerts, blood oxygen, stress and sleep stages. The cycle-tracking article uses manually entered cycle data.

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, Trackback, Ski resort maps1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Smart recognition of 8 sports movements. Strength training counts reps, sets and rest. Pool and open water swimming modes. Interval training on the watch. Downloadable maps with turn-by-turn directions. Ski resort maps. VO2 max, training load and recovery come from the manual

Automatic workout detection, VO2 max, Training load, Recovery advice3Maker product pagesupport.nothing.tech/hc/en-us/sections/31667497585169-Product-FeatureRead 8 October 2026Workout Detection, VO2 Max, Training Load and Recovery Time articles. Automatic detection supports indoor/outdoor running and walking, outdoor cycling, elliptical and rowing. VO2 max needs a moderate or harder running or cycling session of about 15 minutes.

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

Not available

1311Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

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-2-squareRead 15 October 2026Heart rate belt, running and cycling power meter, cycling speedometer and cadence meter. Footnote 17: BLE devices only

Not available

Safety

3 of 6 differ

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

No6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-2-squareRead 15 October 2026Navigation, safety and special features row says No

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.

No6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-2-squareRead 15 October 2026Emergency SOS row says No

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.

No6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-2-squareRead 15 October 2026LED flashlight row says No. The manual Control Center lists a Flashlight control that lights the screen

Not available

Positioning

3 of 3 differ

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

GPS, GLONASS, Galileo, BeiDou, QZSS6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-2-squareRead 15 October 2026GNSS rows list GPS, Galileo, GLONASS, QZSS and BeiDou. This matches the maker's five satellite systems

GPS L1 + L5, GLONASS, Galileo, QZSS, BeiDou1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

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

Not available

Yes1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

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-2-squareRead 15 October 2026Free downloadable maps from the Zepp App with turn-by-turn directions. Footnote 5: OSM map files imported to the watch

Not available

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-2-squareRead 15 October 2026

Yes1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

Bluetooth version

5.21Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Connection: Bluetooth 5.2, BLE

5.31Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

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

Not available

No5Spec databasegsmarena.com/nothing_cmf_watch_3_pro-14217.phpRead 8 October 2026

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-2-squareRead 15 October 2026Cellular row says No

No5Spec databasegsmarena.com/nothing_cmf_watch_3_pro-14217.phpRead 8 October 2026

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.

Yes2Maker product pageeu.amazfit.com/products/active-2-squareRead 15 October 2026Zepp Pay Contactless Payment section: NFC technology. The US page names Zepp Pay NFC only in the battery test scenario

No4Maker product pagesupport.nothing.tech/hc/en-us/articles/37210042924689-Does-Watch-3-Pro-support-NFCRead 8 October 2026

Contactless payments

Yes2Maker product pageeu.amazfit.com/products/active-2-squareRead 15 October 2026Zepp Pay binds up to eight bank cards. Footnote 14: supported by Curve and participating issuer banks in 31 European countries. Only usable for payments in Europe

No4Maker product pagesupport.nothing.tech/hc/en-us/articles/37210042924689-Does-Watch-3-Pro-support-NFCRead 8 October 2026The watch does not support NFC.

Payment services

Zepp Pay2Maker product pageeu.amazfit.com/products/active-2-squareRead 15 October 2026Zepp Pay, in Europe through Curve

Not available

Ultra-wideband

No6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-2-squareRead 15 October 2026UWB row says No

Not available

Satellite

Not available

Not available

ANT+

No1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Footnote 17: connection to peripheral devices only supports BLE devices

Not available

Audio

1 of 4 differ

Speaker

Yes1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Spec table: Mic and Speaker: Support

Yes1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 20262Owner's manualdevice.report/m/8c2f45d7b97f7ec2090e0664e6261cb2da3e796a2be0c7412d067c82e791e69d_optim.pdfRead 8 October 2026

Microphones

Not available

21Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026Calling section states two MEMS microphones. The D399 guide also labels both microphones.2Owner's manualdevice.report/m/8c2f45d7b97f7ec2090e0664e6261cb2da3e796a2be0c7412d067c82e791e69d_optim.pdfRead 8 October 20266Press articlegsmarena.com/cmf_watch_3_pro_launches_with_bigger_143_screen_longer_battery_life_and_higher_price_tag-news-68721.phpRead 8 October 2026

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-2-squareRead 15 October 2026FAQ: Bluetooth phone calls through the paired phone. No cellular model

Phone only1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026Footnote 10 requires a Bluetooth-connected smartphone. Calls from third-party apps are unsupported.

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

No7Reviewgadgetsandwearables.com/2025/06/17/amazfit-active-2-square-vs-roundRead 15 October 2026Comparison table: Music storage No for the Square. The full manual only has phone music controls

No8Reviewtechradar.com/health-fitness/smartwatches/cmf-watch-3-pro-reviewRead 8 October 2026Features section describes phone music control and no onboard user storage for playback.

Controls

5 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.

24Owner's manualsupport.amazfit.com/en/amazfit_active_2%28square%29/imgs/electronic_manual.pdfRead 15 October 2026About the Watch, page 1 shows two buttons. The maker spec table lists Buttons: 2

02Owner's manualdevice.report/m/8c2f45d7b97f7ec2090e0664e6261cb2da3e796a2be0c7412d067c82e791e69d_optim.pdfRead 8 October 2026Product overview and operations panels identify only the rotating, clickable functional crown. No separate operating button is shown.

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

Upper button, Lower button4Owner's manualsupport.amazfit.com/en/amazfit_active_2%28square%29/imgs/electronic_manual.pdfRead 15 October 2026About the Watch, page 1: an upper and a lower button

Not available

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_active_2%28square%29/imgs/electronic_manual.pdfRead 15 October 2026No crown is shown or described. The watch has two buttons and a touchscreen

Rotating2Owner's manualdevice.report/m/8c2f45d7b97f7ec2090e0664e6261cb2da3e796a2be0c7412d067c82e791e69d_optim.pdfRead 8 October 2026

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

Not available

None6Press articlegsmarena.com/cmf_watch_3_pro_launches_with_bigger_143_screen_longer_battery_life_and_higher_price_tag-news-68721.phpRead 8 October 2026The launch article states that the bezel is fixed in place. Watch Pro 2 modular bezels are not supported.

Gestures

Cover the screen to turn it off3Owner's manualsupport.amazfit.com/en/amazfit_active_2%28square%29/files/user-manual.pdf.pdfRead 15 October 2026Common gesture operations, page 3: cover the screen to turn it off

Cover screen with palm, Wrist flip, Double shake2Owner's manualdevice.report/m/8c2f45d7b97f7ec2090e0664e6261cb2da3e796a2be0c7412d067c82e791e69d_optim.pdfRead 8 October 2026English Operations panel supports covering the watch with a palm to turn the screen off. Gesture Control is configured through Nothing X.6Press articlegsmarena.com/cmf_watch_3_pro_launches_with_bigger_143_screen_longer_battery_life_and_higher_price_tag-news-68721.phpRead 8 October 2026

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.

260mAh1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026260 mAh (rated value)

350mAh1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

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 2 (Square)

Mode	With solar	Hours (h)
Smartwatch	No	240
Low power	No	456
Heavy use	No	120
GPS	No	21

Source1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Typical use 10 days (240 h), battery saver 19 days (456 h), heavy use 5 days (120 h), continuous GPS 21 h. Footnote 8: typical use is HR every 10 minutes, sleep monitoring, five daily SpO2 readings, 150 notifications a day and three 30-minute GPS workouts a week. Heavy use is HR every minute with stress and sleep-breathing monitoring and longer screen use. Battery saver turns off health monitoring and GPS. The maker does not state the GPS mode or satellite systems for the 21 h figure

BCMF Watch 3 Pro

Mode	With solar	Hours (h)
Smartwatch	No	312
Heavy use	No	240
Always-on	No	108
Low power	No	1,440
GPS	No	17.2

Source1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026Current Battery table: typical 13 days, heavy 10 days, AOD plus heavy 4.5 days, power saving 60 days, GPS 17.2 hours. Days are converted exactly to hours. Typical and heavy modes include 120 minutes GPS and 30 minutes Bluetooth calls per week. Typical includes heart rate every five minutes, 100 screen activations and 100 message views per day. Heavy adds 200 screen activations and message views, six daily manual heart rate and SpO2 checks, and automatic stress and SpO2 every 30 minutes. AOD daily duration and continuous-GPS band settings are not stated here. These are maker laboratory claims. The support FAQ differs: 10.5 days heavy and 4.4 days with 12 hours daily AOD. Current product claims are retained.11Maker product pagesupport.nothing.tech/hc/en-us/articles/37210046005777-How-long-does-Watch-3-Pro-s-battery-lastRead 8 October 2026The FAQ differs from the current product table: 10.5 days heavy use and 4.4 days with heavy use plus 12 hours daily AOD. It agrees on 13 days typical use. The current product table claims of 10 days heavy and 4.5 days AOD are retained. The FAQ AOD schedule is not transferred to the product table claim.

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.

240h=CalculatedFrom Claimed battery life

312h=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.

Not available

108h=CalculatedFrom Claimed battery life

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

21h=CalculatedFrom Claimed battery life

17.2h=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 manualsupport.amazfit.com/en/amazfit_active_2%28square%29/imgs/electronic_manual.pdfRead 15 October 2026Charging the Watch, page 3: metal contacts on the back of the watch meet the charging base. USB-C attaches to the base

Magnetic pins2Owner's manualdevice.report/m/8c2f45d7b97f7ec2090e0664e6261cb2da3e796a2be0c7412d067c82e791e69d_optim.pdfRead 8 October 2026English Charge panel: two metal pads on the watch align with the metal tips on the charging cable.8Reviewtechradar.com/health-fitness/smartwatches/cmf-watch-3-pro-reviewRead 8 October 2026Performance section identifies the magnetic charging puck. The D399 guide separately establishes two metal contacts at the watch.

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

Charges on the supplied magnetic charging base. A USB-C cable is not included. The manual recommends a power adapter with a charging current of 1 A or above.4Owner's manualsupport.amazfit.com/en/amazfit_active_2%28square%29/imgs/electronic_manual.pdfRead 15 October 2026Charging the Watch, page 3: use the supplied base and a power adapter with a charging current of 1 A or above

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.

120min1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Theoretical charging duration approx. 2 hours. The FAQ says about 2 hours from empty. Maker claim, no adapter named

99min1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026Battery table gives a nominal charging time of 99 minutes. Starting percentage and charger conditions are not stated.

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/active-2-squareRead 15 October 2026Strap Width: 20mm

22mm7Reviewgsmarena.com/cmf_watch_3_pro_in_for_review-news-69839.phpRead 8 October 2026The review introduction identifies standard 22 mm bands for Watch 3 Pro.

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

Yes2Maker product pageeu.amazfit.com/products/active-2-squareRead 15 October 2026Strap, Materials: Leather, Quick release

Yes2Owner's manualdevice.report/m/8c2f45d7b97f7ec2090e0664e6261cb2da3e796a2be0c7412d067c82e791e69d_optim.pdfRead 8 October 2026English Change straps panel identifies a quick-release lever at each strap end.

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

20 mm quick release2Maker product pageeu.amazfit.com/products/active-2-squareRead 15 October 2026Strap, Width: 20mm, Materials: Leather, Quick release. The silicone strap range is also 20 mm

Standard 22 mm quick-release straps7Reviewgsmarena.com/cmf_watch_3_pro_in_for_review-news-69839.phpRead 8 October 2026

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

Leather1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Standard strap is leather. The US package adds a red sport silicone strap

Silicone1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026Design table describes a liquid silicon strap. The product text identifies it as silicone.

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 2 (Square)

Size	Wrist (min) (mm)	Wrist (max) (mm)
Leather strap	150	210
Silicone strap	135	195

Source1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Min. and Max. Wrist Dimensions: leather 150-210 mm, silicone 135-195 mm

BCMF Watch 3 Pro

Not available

Regulatory

None of 3 known

FCC ID

Not available

Not available

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 and additional red sport silicone strap), Magnetic charging base (no USB Type-C cable), Instruction manual1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Packing list, US package2Maker product pageeu.amazfit.com/products/active-2-squareRead 15 October 2026EU packing list lists the standard strap only

CMF Watch 3 Pro, Charging cable, User guide and safety information, Warranty information1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

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

No1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026Magnetic charging base without USB-C cable

No1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026Complete In the box table lists the watch, charging line and documents. No power adapter is listed.

Links

Not compared

Product page

us.amazfit.com/products/active-2-square1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026

us.nothing.tech/products/cmf-watch-3-pro1Maker product pageus.nothing.tech/products/cmf-watch-3-proRead 8 October 2026

Spec sheet

us.amazfit.com/products/active-2-square1Maker product pageus.amazfit.com/products/active-2-squareRead 15 October 2026

Not available

Manual

support.amazfit.com/en/amazfit_active_2%28square%29/files/user-manual.pdf.pdf3Owner's manualsupport.amazfit.com/en/amazfit_active_2%28square%29/files/user-manual.pdf.pdfRead 15 October 2026Active 2 (Square) user manual, 37 pages, June 2025

device.report/m/8c2f45d7b97f7ec2090e0664e6261cb2da3e796a2be0c7412d067c82e791e69d_optim.pdf2Owner's manualdevice.report/m/8c2f45d7b97f7ec2090e0664e6261cb2da3e796a2be0c7412d067c82e791e69d_optim.pdfRead 8 October 2026Original maker foldout, version 2, MODEL D399 and WATCH 3 PRO. English panels appear on the single multilingual PDF page.

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

Not available

Not available

Warranty

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/active-2-squareRead 15 October 20261 year warranty, US store

Not available

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