Smartwatches / Compare

Amazfit Active 2 (Round) vs CMF Watch 3 Pro

A

Product A: Amazfit

Active 2 (Round)

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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 (Round)

BCMF Watch 3 Pro

General

7 of 10 differ

Series

Active1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026

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.

A2433, A2437, W2437GL3N, W2437GL1N, ACTIVE2RBK-C0208005007, ACTIVE2RLE-C02080350012Owner's manualsupport.amazfit.com/en/amazfit_active_2%28round%29/imgs/electronic_manual.pdfRead 5 October 2026Printed page 6 identifies NFC model A2433 and non-NFC A2437. Exact retail SKU mappings come from current regional product pages. Shared NFC/payment flags are omitted because they are not variant-enabled and cannot safely describe both editions.7Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 20268Maker product pagede.amazfit.com/products/amazfit-active-2Read 5 October 2026

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

GTIN / EAN

Not available

Not available

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

6 January 20254Press releaseus.amazfit.com/blogs/news/amazfit-announces-the-active-2-the-ultimate-everyday-smartwatch-for-active-and-healthy-livingRead 5 October 2026Opening actual announcement January 6, 2025. Its preorder and planned global February availability are not used as actual retail.

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

Not available

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.

$99.994Press releaseus.amazfit.com/blogs/news/amazfit-announces-the-active-2-the-ultimate-everyday-smartwatch-for-active-and-healthy-livingRead 5 October 2026US launch explicitly prices Standard 99.99 USD and Premium 129.99 USD. These US suggested retail prices are distinct from current store prices. Exact standard and premium US rows repeat their launch prices. German rows remain unknown in this price column.

$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.

Not available

€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, DE7Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 20268Maker product pagede.amazfit.com/products/amazfit-active-2Read 5 October 2026

Not available

ColoursiThe maker's own colour names

Red Sport Silicone, Black Sport Silicone, Black Leather – Premium1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026Three marketed combinations are stated in the technical table. Exact current US and German retail SKUs prove the represented sold configurations.

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-roundRead 5 October 20264Press releaseus.amazfit.com/blogs/news/amazfit-announces-the-active-2-the-ultimate-everyday-smartwatch-for-active-and-healthy-livingRead 5 October 2026

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

5 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.

44mm1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026Product overview explicitly markets a 44 mm case. Physical dimensions are 43.9 mm and remain separate.

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

Round1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026

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-roundRead 5 October 2026Technical table describes a stainless-steel bezel and polymer middle frame. Mixed materials follow the actual published housing components, not launch shorthand that calls the entire body steel.

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 and polymer middle frame1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026

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.

Height43.9Width43.9Thickness9.9mm(1.7 × 1.7 × 0.4 in)1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026Technical Specifications / Design explicitly excludes the heart-rate sensor base from the 9.9 mm 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.

29.5g(1 oz)1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026Technical table explicitly excludes the strap. Standard 29.5 g and Premium 31.65 g are repeated in their exact variant rows.

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-roundRead 5 October 2026Technical table and note 5: 5 ATM, ISO 22810:2010, SGS report SHES241102180871. Static pressure is not a diving depth. Hot showers and saunas are excluded. Leather is unsuitable for swimming.

Not available

Water resistance standard

ISO 22810:20101Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026

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°C2Owner's manualsupport.amazfit.com/en/amazfit_active_2%28round%29/imgs/electronic_manual.pdfRead 5 October 2026Printed page 6 Basic Parameters explicitly gives working range 0 to 45 Celsius, distinct from storage or charging input.

Not available

Display

5 of 14 differ

Display type

OLED1Maker product pageus.amazfit.com/products/active-2-roundRead 5 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-roundRead 5 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.

1.32in(3.4 cm)1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026

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

Resolution

466 × 466px1Maker product pageus.amazfit.com/products/active-2-roundRead 5 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.

353ppi1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026

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

Display area

Not available

Not available

Touchscreen

Yes1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026

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-roundRead 5 October 2026Maker note 1: outdoor/automatic brightness claim, unavailable below 30 percent battery. The 2,000 nit limit requires automatic brightness and depends on the environment. No full-screen sustained value is inferred.

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/us/amazfit_active_2(round)/files/user-manual.pdf.pdfRead 5 October 2026Printed page 4 Always On Display explicitly enables standby time and watchface information.

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

Display cover

Other glass1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026

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

Display cover (as published)

Tempered glass with anti-fingerprint coating1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026Standard tempered glass and Premium sapphire are explicitly distinguished in the technical table and exact supplied-strap variants.

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

Platform

4 of 15 differ

Platform

Proprietary6Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 5 October 2026Current maker developer table identifies exact Active 2 (Round) under Devices with Zepp OS, rather than Non-Zepp OS Devices. Zepp OS is a proprietary wearable platform.

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

OS at launch

Not available

Not available

Software

Not available

Not available

Latest OS

Zepp OS 5.06Maker product pagedocs.zepp.com/docs/reference/related-resources/device-listRead 5 October 2026Exact Active 2 (Round) row explicitly names latest Zepp OS version 5.0. API level 4.2 is separate and is not an OS version. No launch version or upgrade-duration promise is inferred.

Not available

Works with

iOS, Android1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026

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

Phone requirement

Android 7.0 or iOS 14.0 and later.1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026

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

Yes1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026Maker app section and full manual printed page 36 explicitly support installed Mini Apps from the Zepp app store.3Owner's manualsupport.amazfit.com/us/amazfit_active_2(round)/files/user-manual.pdf.pdfRead 5 October 2026Printed page 36 Mini App installation and uninstallation uses the Zepp device 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-roundRead 5 October 2026Technical Lifestyle table and note 12: Zepp Flow in supported countries and regions, with eight named supported languages. Replies require a connected Android 7 or later phone. This is an assistant capability, not an unrestricted standalone service.

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

3 of 8 differ

Heart rate sensor

BioTracker 6.0 PPG, two LEDs and five photodiodes1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 20264Press releaseus.amazfit.com/blogs/news/amazfit-announces-the-active-2-the-ultimate-everyday-smartwatch-for-active-and-healthy-livingRead 5 October 2026Cutting-Edge Technology explicitly states two LEDs and five photodiodes for BioTracker 6.0.

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.

Not available

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-roundRead 5 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-roundRead 5 October 2026Technical Health Features explicitly lists 24-hour Skin temperature. This is not inferred from a generic temperature sensor.

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.

Not available

Not available

Body composition sensor

Not available

Not available

Skin conductance (EDA)

Not available

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-roundRead 5 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-roundRead 5 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-roundRead 5 October 2026

Not available

Compass

Yes1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026

Not available

Ambient light sensor

Yes1Maker product pageus.amazfit.com/products/active-2-roundRead 5 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-roundRead 5 October 2026Technical health table explicitly supports all retained functions. HRV is sleep HRV. Readiness is a daily wellness score. Note 3 requires enabling periodic HR/SpO2/stress and setting alert thresholds, with movement and fit restrictions. These are wellness functions. Sleep-breathing quality is not clinical sleep-apnea notification.3Owner's manualsupport.amazfit.com/us/amazfit_active_2(round)/files/user-manual.pdf.pdfRead 5 October 2026Printed pages 25-28 explain daily readiness from HR, stress, sleep, HRV and temperature, and explicit sleep stages including REM. No clinical apnea claim is inferred.

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, Trackback3Owner's manualsupport.amazfit.com/us/amazfit_active_2(round)/files/user-manual.pdf.pdfRead 5 October 2026Printed pages 12-15 define interval/rest/repeat training, route import, turn prompts and return along the recorded track. Pages 17/18 explicitly define pool/open-water SWOLF and stroke recognition. Page 19 automatically records eight recognized workouts. Pages 20-23 specify VO2 max, EPOC load and recovery. VO2 max requires qualifying running with HR at least 75 percent of maximum. The maker launch explicitly proves automatic strength rep/set counts.4Press releaseus.amazfit.com/blogs/news/amazfit-announces-the-active-2-the-ultimate-everyday-smartwatch-for-active-and-healthy-livingRead 5 October 2026Fitness section explicitly counts reps, sets and rest time during recognized strength exercises.

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.

1641Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026Technical table explicitly says 164. The complete matching 13-category list contains 164 comma-separated profile names. Neither the 160+ headline nor 25 recognized strength movements substitutes for this profile count.

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-roundRead 5 October 2026Technical table and note 18 explicitly support BLE heart-rate belts, running/cycling power meters, cycling speed and cadence sensors. External power-meter compatibility is not built-in running-power proof.

Not available

Safety

None of 6 known

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

Not available

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.

Not available

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.

Not available

Not available

Positioning

3 of 3 differ

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

GPS1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026Manual identifies GPS positioning. Maker says five satellite systems but does not name the other four, so they are not guessed.

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.

No10Measurementnotebookcheck.net/Amazfit-Active-2-smartwatch-review-Price-performance-king.1084077.0.htmlRead 5 October 2026GPS and navigation explicitly says all supported satellite systems use single band. No individual unnamed constellation or band number is inferred.

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-roundRead 5 October 2026Maker note 6 explicitly supports imported OSM files stored on the watch. The matching local map and an imported route are needed for navigation, with supported outdoor sports and valid positioning. A point cannot be selected directly on the map for navigation.

Not available

Connectivity

6 of 15 differ

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

Not available

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

Bluetooth version

5.21Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026

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.

Not available

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.

Not available

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

Contactless payments

Not available

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

Not available

Not available

Ultra-wideband

Not available

Not available

Satellite

Not available

Not available

ANT+

Not available

Not available

Audio

1 of 4 differ

Speaker

Yes1Maker product pageus.amazfit.com/products/active-2-roundRead 5 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

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-roundRead 5 October 2026

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.

No5Press articlegadgetsandwearables.com/2025/01/24/amazfit-active-2-amazonRead 5 October 2026Exact model smart-features paragraph explicitly states it has no offline music storage. Full manual only provides phone music controls, not local music transfer or playback.

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

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

21Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026

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 button2Owner's manualsupport.amazfit.com/en/amazfit_active_2%28round%29/imgs/electronic_manual.pdfRead 5 October 2026Printed page 2 complete About the Watch diagram names Upper and Lower buttons. Neither is described as a rotating crown.

Not available

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

None9Reviewtechadvisor.com/article/2949577/amazfit-active-2-review.htmlRead 5 October 2026Design & Build explicitly says there is no rotating crown and scrolling uses the touchscreen. Round version, not the separately mentioned Square.

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

Not available

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

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

270mAh1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026Technical table explicitly states 270 mAh rated capacity. No typical capacity is substituted.

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 (Round)

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-roundRead 5 October 2026Maker note 2: normal use includes optical HR every 10 minutes, sleep tracking, five daily SpO2 readings, 150 daily notifications, 30 minutes weekly calls and three weekly 30-minute GPS workouts. Heavy use changes HR to once per minute, adds stress and eight hours of sleep-breathing monitoring, 60 minutes weekly calls and longer screen use. Saver disables health functions and GPS. Continuous GPS claim has no explicit multi-band or music condition. Day claims convert exactly to hours. No AOD runtime is inferred.

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 pins1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026Quick guide printed page 4 explicitly describes metal charging contacts mating with the magnetic base. The USB-C socket is on the base, not the watch.2Owner's manualsupport.amazfit.com/en/amazfit_active_2%28round%29/imgs/electronic_manual.pdfRead 5 October 2026Printed page 4 explicitly identifies metal charging contacts fitting closely to the charging 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.

Not available

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

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

Not available

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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

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

Not available

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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-roundRead 5 October 2026Technical table and FAQ explicitly approximate two hours from empty to full. Adapter details are not given. This is a maker claim, not a timed measurement.

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

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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.

90min10Measurementnotebookcheck.net/Amazfit-Active-2-smartwatch-review-Price-performance-king.1084077.0.htmlRead 5 October 2026Battery life / charging: exact Standard Round review unit, with black silicone strap and mineral glass, took approximately 90 minutes for a full charge on an Anker 335 adapter. The same paragraph explicitly begins the charge trace at 0 percent. Review reports Zepp OS 4.5 and pairing to Galaxy S24 Ultra with Android 15. Firmware minor, ambient temperature and charger port are not separately published. This differs from the maker approximate 120 minutes because adapter/test conditions are different and the maker does not name an adapter.

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Strap

3 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-roundRead 5 October 2026

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.

Yes1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026

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.

Not available

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.

Silicone1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026

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

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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 (Round)

Wrist (min) (mm)	Wrist (max) (mm)
135	195

Source1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026

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

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Other certifications

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In the box

1 of 2 differ

In the box

Smartwatch with supplied strap, Magnetic charging base, Instruction manual1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026Technical packing list includes watch with standard strap, charging base and instruction manual. USB-C cable and power adapter are absent. The original launch additionally supplies a red silicone strap with the US Premium package, recorded only in that variant row.4Press releaseus.amazfit.com/blogs/news/amazfit-announces-the-active-2-the-ultimate-everyday-smartwatch-for-active-and-healthy-livingRead 5 October 2026Launch design paragraph explicitly includes an additional red silicone strap in the Premium package. Retained only for the represented US Premium configuration.

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-roundRead 5 October 2026

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-round1Maker product pageus.amazfit.com/products/active-2-roundRead 5 October 2026

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

Spec sheet

Not available

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Manual

support.amazfit.com/us/amazfit_active_2(round)/files/user-manual.pdf.pdf3Owner's manualsupport.amazfit.com/us/amazfit_active_2(round)/files/user-manual.pdf.pdfRead 5 October 2026Original complete Active 2 (Round) user guide, 38 pages. It is not the Square manual. A map-download instruction incorrectly refers to Wi-Fi although exact quick parameters and maker connectivity table do not publish Wi-Fi. Wi-Fi standards/bands are omitted rather than inherited from this instruction.

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.

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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.

1year2Owner's manualsupport.amazfit.com/en/amazfit_active_2%28round%29/imgs/electronic_manual.pdfRead 5 October 2026Printed page 11 limited manufacturer warranty explicitly covers one year from original purchase, with additional statutory consumer rights unaffected.

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