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Amazfit T-Rex 3 vs Garmin fēnix 8 AMOLED

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Product A: Amazfit

T-Rex 3

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Product B: Garmin

fēnix 8 AMOLED

87 of 150 known

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Only differences

AAmazfit T-Rex 3

BGarmin fēnix 8 AMOLED

General

6 of 10 differ

Series

T-Rex1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Amazfit T-Rex series.

fēnix8Press releasegarmin.com/en-US/newsroom/press-release/outdoor/garmin-adds-amoled-displays-to-fenix-8-series-its-most-capable-lineup-of-premium-multisport-gps-smartwatches-with-something-for-everyoneRead 30 September 2026

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

W2323GL2N, W2323GL3N, W2323GL9N1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Store variant SKUs: W2323GL2N (Onyx), W2323GL3N (Lava), W2323GL9N (Haze Gray). The retail model code seen on resellers is not stored. The T-Rex 3 Pro is a separate model.

010-02903-00, 010-02903-10, 010-02903-20, 010-02903-11, 010-02903-21, 010-02904-00, 010-02904-10, 010-02904-20, 010-02904-11, 010-02904-21, 010-02905-00, 010-02905-10, 010-02905-20, 010-02905-11, 010-02905-21, 010-02903-40, 010-02904-40, 010-02905-40, A04805, A04806, A048081Maker product pagegarmin.com/en-US/p/1228493Read 30 September 20262Maker product pagegarmin.com/en-US/p/1228429Read 30 September 20263Maker product pagegarmin.com/en-US/p/1228171Read 30 September 20264Maker product pagegarmin.com/en-GB/p/1228429Read 30 September 2026UK part numbers -11, -21 and -40 editions, plus 010-02904-00. The -40 editions (leather band or titanium bracelet) have no variant row, since their weight with strap is not published6Owner's manualwww8.garmin.com/manuals/webhelp/GUID-EECCAC99-90D6-4AB1-9A3A-EC433D3365E2/EN-US/GUID-0E0E1DD5-ABF5-4077-BA54-08D42C24353E.htmlRead 30 September 2026fenix 8 AMOLED M/N A04805, A04806 and A04808. Which M/N belongs to which case size was not found

GTIN / EAN

Not available

753759337971, 75375933810710Retailer pageabt.com/Garmin-fenix-8-Smartwatch-43mm-AMOLED-in-Silver-with-Whitestone-Silicone-Band-0100290300/p/211053.htmlRead 30 September 2026UPC 753759337971 for 010-02903-0011Retailer pageabt.com/Garmin-fenix-8-Smartwatch-47mm-AMOLED-Sapphire-in-Carbon-Gray-DLC-Titanium-with-Black-Silicone-Band-0100290420/p/211048.htmlRead 30 September 2026UPC 753759338107 for 010-02904-20

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

6 September 20243Press releasezepp.com/press-release/amazfit-t-rex-3-launches-at-ifa-berlin-redefining-adventure-for-modern-explorersRead 13 October 2026Dated Berlin, 6 September 2024, unveiled at IFA Berlin.

27 August 20248Press releasegarmin.com/en-US/newsroom/press-release/outdoor/garmin-adds-amoled-displays-to-fenix-8-series-its-most-capable-lineup-of-premium-multisport-gps-smartwatches-with-something-for-everyoneRead 30 September 2026

Status

Available1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Store lists Onyx and Haze Gray as available at 279.99 USD.

Available1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026On sale on the date accessed

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

Not available

Garmin fēnix 7 Pro14Reviewtech.yahoo.com/general/articles/garmin-fenix-8-release-date-090002094.htmlRead 23 October 2026Tom's Guide, syndicated on Yahoo Tech, says the Fenix 8 is the follow up to the Fenix 7 and Fenix 7 Pro.

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

Not available

Garmin fēnix 99Reviewdcrainmaker.com/2024/08/garmin-fenix-8-in-depth-review.htmlRead 30 September 2026DC Rainmaker's Fenix 8 review carries a note saying it has been replaced by the Garmin Fenix 9 AMOLED.15Reviewnotebookcheck.net/Garmin-releases-new-high-end-smartwatch-globally-with-brighter-AMOLED-display-and-29-days-battery-life.1378019.0.htmlRead 23 October 2026Notebookcheck says the Fenix 9 directly replaces the Fenix 8.

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

$279.993Press releasezepp.com/press-release/amazfit-t-rex-3-launches-at-ifa-berlin-redefining-adventure-for-modern-explorersRead 13 October 2026Prices from 279.99 USD. US price excludes sales tax.

$999.998Press releasegarmin.com/en-US/newsroom/press-release/outdoor/garmin-adds-amoled-displays-to-fenix-8-series-its-most-capable-lineup-of-premium-multisport-gps-smartwatches-with-something-for-everyoneRead 30 September 2026Suggested retail prices start at $999.99

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

€299.93Press releasezepp.com/press-release/amazfit-t-rex-3-launches-at-ifa-berlin-redefining-adventure-for-modern-explorersRead 13 October 2026Prices from 299.90 EUR, VAT included.

Not available

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

Not available

US, GB, DE, EU1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 20264Maker product pagegarmin.com/en-GB/p/1228429Read 30 September 20265Maker product pagegarmin.com/de-DE/p/1228429Read 30 September 2026

ColoursiThe maker's own colour names

Onyx, Lava, Haze Gray1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Spec table: Onyx, Lava, Gray. The store option for the gray one is Haze Gray. Lava is sold out on the access date.

Silver, Soft Gold, Carbon Gray DLC Titanium, Slate Gray, Titanium1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Segment

Outdoor1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Amazfit sells it as a rugged outdoor smartwatch.

Outdoor1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026Listed under Outdoor Recreation > Adventure Watches

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

7 of 8 differ

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

48mm1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Feature text: 1.88 inch (48 mm) case. Physical size is 48.5 mm.

43, 47, 51mm1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Case shape

Round1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026

Round1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026Round body outline observed in the exact base-SKU manufacturer figure (010-02903-00 or 010-02969-00), whose image and model caption are in the public GarminAppBootstrap.

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/amazfit-t-rex-3Read 13 October 2026Body material: stainless steel bezel, polymer middle frame. Stored as mixed.

Fibre-reinforced polymer1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Case material (as published)

Stainless steel bezel, polymer middle frame1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026

fiber-reinforced polymer with metal rear cover1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026Case material: fiber-reinforced polymer with metal rear cover. Bezel: stainless steel or titanium

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

Not available

metal rear cover1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

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

Height48.5Width48.5Thickness13.75mm(1.9 × 1.9 × 0.5 in)1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Dimensions without heart rate base: 48.5 x 48.5 x 13.75 mm. The thickness leaves out the sensor base.

Height43Width43Thickness13.8mm(1.7 × 1.7 × 0.5 in)1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

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

68.3g(2.4 oz)1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Weight (without strap): 68.3 g.

50g(1.8 oz)1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026Stainless Steel: 66 g (case only: 50 g). Titanium: 60 g (case only: 44 g). Titanium bezel comes with the sapphire lens

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

66g(2.3 oz)1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026With the included silicone band

Durability

6 of 8 differ

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

10ATM1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Water-resistance grade 10 ATM. Note 4 says it is rated to ISO 22810:2010 for 100 m and passed SGS testing.

10ATM1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 20266Owner's manualwww8.garmin.com/manuals/webhelp/GUID-EECCAC99-90D6-4AB1-9A3A-EC433D3365E2/EN-US/GUID-0E0E1DD5-ABF5-4077-BA54-08D42C24353E.htmlRead 30 September 202610 ATM (pressure equivalent to 100 m). 4 ATM Dive (EN 13319)

Water resistance standard

ISO 22810:20101Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Note 4: according to ISO 22810:2010 the watch achieves 10 ATM.

Not available

Dust and water rating

Not available

Not available

Dive rating

EN 13319, ISO 6425, GB/T 188281Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Diving certification: EN13319, ISO 6425, GB/T 18828 for freediving to 147 feet.

EN 133196Owner's manualwww8.garmin.com/manuals/webhelp/GUID-EECCAC99-90D6-4AB1-9A3A-EC433D3365E2/EN-US/GUID-0E0E1DD5-ABF5-4077-BA54-08D42C24353E.htmlRead 30 September 2026

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

44.8m1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026147 feet converted exactly is 44.8 m. This is the certified freediving depth in the specification table.

40m1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026Dive activity maximum operating depth: 40 meters

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

Yes8Press releasegarmin.com/en-US/newsroom/press-release/outdoor/garmin-adds-amoled-displays-to-fenix-8-series-its-most-capable-lineup-of-premium-multisport-gps-smartwatches-with-something-for-everyoneRead 30 September 2026

MIL-STD-810 tests

Not available

thermal, shock, water resistance8Press releasegarmin.com/en-US/newsroom/press-release/outdoor/garmin-adds-amoled-displays-to-fenix-8-series-its-most-capable-lineup-of-premium-multisport-gps-smartwatches-with-something-for-everyoneRead 30 September 2026tested to U.S. military standards for thermal, shock and water resistance

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

Min-30Max70°C1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Feature text: withstands temperatures from 158 F to -22 F, which is 70 to -30 degrees C. Note 3 says low temperature mode must be switched on and limits functions when the watch surface is below -10 degrees C.

Min-20Max45°C6Owner's manualwww8.garmin.com/manuals/webhelp/GUID-EECCAC99-90D6-4AB1-9A3A-EC433D3365E2/EN-US/GUID-0E0E1DD5-ABF5-4077-BA54-08D42C24353E.htmlRead 30 September 2026Operating and storage temperature range -20 to 45 C. Underwater 0 to 40 C

Display

5 of 14 differ

Display type

OLED1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026

OLED1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Display type (as published)

AMOLED1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026

AMOLED1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

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

1.5in(3.8 cm)1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Display size 1.5 inch.

1.3in(3.3 cm)1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Resolution

480 × 480px1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026

416 × 416px1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

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

322ppi1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026PPI 322 as published. 480 pixels over 1.5 inch is 320.

Not available

Display area

Not available

Not available

Touchscreen

Yes1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Touchscreen: Gorilla Glass. Glove mode works with gloves up to 2 mm thick.

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Max refresh rateiHighest published display refresh rate in active operation.

Not available

Not available

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

Not available

Not available

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

2,000nits1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Able to reach 2,000 nits peak brightness. Note 2: not supported in low temperature mode or when battery life is below 30%, and needs automatic brightness.

Not available

Minimum brightness

Not available

Not available

Always-on display

Yes1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026The manual lists an Always On Display setting (see manual source).2Owner's manualsupport.amazfit.com/en/amazfit_t-rex_3/files/user-manual.pdf.pdfRead 13 October 2026Settings > Display > Always On Display.

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Display cover

Gorilla Glass1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026

Gorilla Glass1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Display cover (as published)

Gorilla Glass1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Spec table says Gorilla Glass. No generation is named.

Corning® Gorilla® Glass1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026Lens material: Corning Gorilla Glass or sapphire crystal. Sapphire editions have the titanium bezel

Platform

4 of 15 differ

Platform

Proprietary1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Zepp OS. The page says Zepp Flow is integrated at all levels of Zepp OS 4.5.

Proprietary1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

OS at launch

Zepp OS 43Press releasezepp.com/press-release/amazfit-t-rex-3-launches-at-ifa-berlin-redefining-adventure-for-modern-explorersRead 13 October 2026Launched with Zepp OS 4.

Not available

Software

Not available

Not available

Latest OS

Zepp OS 4.51Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Zepp OS 4.5 per the page on the access date.

Not available

Works with

iOS, Android1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 20262Owner's manualsupport.amazfit.com/en/amazfit_t-rex_3/files/user-manual.pdf.pdfRead 13 October 2026Pairs with the Zepp app on Android or iOS.

iOS, Android1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Phone requirement

Android 7.0 and above, iOS 14.0 and above, with the Zepp app1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Supported devices: Android 7.0 and above, iOS 14.0 and above. The manual says Android 7.0 or iOS 12.0 or later.

Not available

App store

Yes1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Hundreds of mini apps can be downloaded from the Zepp App. Examples are Sonos Control and Pill Reminder.

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Voice assistants

Zepp Flow1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Zepp Flow with OpenAI GPT-4o technology. Available in select countries and regions.

Voice Commands, Phone Assistant12Owner's manualwww8.garmin.com/manuals/webhelp/GUID-EECCAC99-90D6-4AB1-9A3A-EC433D3365E2/EN-US/fenix_8_Series_OM_EN-US.pdfRead 30 September 2026Named manual sections Using Voice Commands and Using the Phone Assistant. Phone Assistant relies on the paired smartphone.

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

32GB1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026Memory/History: 32 GB on every AMOLED size and edition

Health sensors

4 of 8 differ

Heart rate sensor

BioTracker 6.0 PPG biometric sensor1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Health sensor: BioTracker 6.0 PPG biometric sensor.

Garmin Elevate Gen 513Reviewdcrainmaker.com/2025/06/garmin-forerunner-970-in-depth-review-brillance.htmlRead 30 September 2026Basics: names Elevate Gen5, then explicitly states this sensor is also found on Fenix 8. The Fenix 8 review itself does not name the generation.

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

Not available

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

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

Yes1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 202624-hour and manual blood-oxygen saturation. Not a medical device.

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

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

Not available

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

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

FDA-cleared ECG app8Press releasegarmin.com/en-US/newsroom/press-release/outdoor/garmin-adds-amoled-displays-to-fenix-8-series-its-most-capable-lineup-of-premium-multisport-gps-smartwatches-with-something-for-everyoneRead 30 September 2026ECG app, an FDA-cleared app. Not available in all regions

Motion and environment sensors

2 of 9 differ

Accelerometer

Yes1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Accelerometer range

Not available

Not available

Gyroscope

Yes1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Barometric altimeter

Yes1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Compass

Yes1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Compass is listed. The movement sensors include a geomagnetic sensor.

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Ambient light sensor

Yes1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Depth gauge

Not available

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

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

Not available

40m1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026Depth sensor: yes (to 40 m)

Water temperature sensor

Not available

Not available

Health and fitness

5 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 score1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 202624-hour heart rate, blood oxygen and stress, abnormal high and low heart rate alerts, sleep stages including REM, readiness and heart rate variability. Not medical devices.

Continuous heart rate, Heart rate alerts, ECG app, Blood oxygen app, Heart rate variability, Sleep tracking, Stress tracking, Readiness score, Cycle tracking1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026Exact current table confirms past ovulation estimates but does not establish temperature-based input. That more-specific option is removed. Other health features have exact yes cells.

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.

VO2 max, Training load, Recovery advice, Running power, 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/amazfit-t-rex-3Read 13 October 2026VO2 Max, training load and recovery time, running power analysis, pool and open-water swim, strength training with rep counting, interval training, offline maps, turn-by-turn directions, direct return navigation and ski resort maps. The climbing gradient view is not stored as climb detection.

VO2 max, Training load, Recovery advice, Running dynamics, Running power, Pool swim, Open water swim, Strength rep counting, Interval workouts, Route navigation, Turn-by-turn navigation, Trackback, Climb detection, Golf courses1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026VO2 max, training load, recovery time, running dynamics, running power, pool and open-water swim, automatic rep counting, interval training, course guidance, TracBack, ClimbPro, 43,000 golf courses. Turn-by-turn from the press release8Press releasegarmin.com/en-US/newsroom/press-release/outdoor/garmin-adds-amoled-displays-to-fenix-8-series-its-most-capable-lineup-of-premium-multisport-gps-smartwatches-with-something-for-everyoneRead 30 September 2026get turn-by-turn directions

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

1771Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Sports Modes: 177. Marketing copy says 170+.

Not available

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

Freedive1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Diving workouts listed: outdoor freediving, indoor freediving, spearfishing. The feature text says freediving and recreational diving certified and note 9 names the Buhlmann ZHL-16C model. No scuba workout is listed, so only freedive is stored.

Snorkel, Scuba, single gas, Freedive1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026Dive: Scuba Diving (single gas), Apnea Diving. Snorkeling under On the water. Gas mixes: Air, Nitrox (21-40% Oxygen)

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/amazfit-t-rex-3Read 13 October 2026Bluetooth peripherals: heart rate belts, running power meter (Stryd), cycling power meter, cadence and speed sensors. Only BLE devices are supported.

Heart rate strap, Power meter, Speed and cadence, Foot pod, Smart trainer1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Safety

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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

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026Safety and Tracking > Assistance. Sends an alert to preset personal emergency contacts through a paired phone. It does not call emergency services.

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

Not available

Not available

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

Not available

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026Live event sharing: yes8Press releasegarmin.com/en-US/newsroom/press-release/outdoor/garmin-adds-amoled-displays-to-fenix-8-series-its-most-capable-lineup-of-premium-multisport-gps-smartwatches-with-something-for-everyoneRead 30 September 2026incident detection, assistance and LiveTrack

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

Not available

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Positioning

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

Not available

GPS, GLONASS, Galileo, QZSS, BeiDou1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

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

Yes1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Dual-band and six satellite positioning systems. The page does not name the systems.

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 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/amazfit-t-rex-3Read 13 October 2026Offline Maps: Support.

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026Preloaded road and trail maps on Sapphire editions only. Downloadable cartography on all

Connectivity

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

Yes1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Connection: WiFi 2.4GHz, Bluetooth 5.2, BLE.

Not available

Bluetooth version

5.21Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Bluetooth 5.2.

Not available

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

Yes1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026WiFi 2.4GHz. The page also lists OTA update via Wi-Fi.

Not available

Wi-Fi standard

Not available

Not available

Wi-Fi bands

2.4 GHz1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026

Not available

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

No1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Connection lists WiFi 2.4GHz, Bluetooth 5.2 and BLE only. No cellular radio.

No9Reviewdcrainmaker.com/2024/08/garmin-fenix-8-in-depth-review.htmlRead 30 September 2026Reviewer explicitly states missing LTE/cellular built-in. Not inferred solely from the maker connectivity list.

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.

Yes3Press releasezepp.com/press-release/amazfit-t-rex-3-launches-at-ifa-berlin-redefining-adventure-for-modern-explorersRead 13 October 2026Contactless payments need NFC. A spec database lists NFC (Zepp Pay).4Spec databasethe5krunner.com/specs/amazfit/t-rex-3Read 13 October 2026Lists NFC (Zepp Pay).

Yes6Owner's manualwww8.garmin.com/manuals/webhelp/GUID-EECCAC99-90D6-4AB1-9A3A-EC433D3365E2/EN-US/GUID-0E0E1DD5-ABF5-4077-BA54-08D42C24353E.htmlRead 30 September 2026Wireless frequencies list 13.56 MHz for each AMOLED model

Contactless payments

Yes3Press releasezepp.com/press-release/amazfit-t-rex-3-launches-at-ifa-berlin-redefining-adventure-for-modern-explorersRead 13 October 2026Zepp Pay: users in 31 countries across Europe can make contactless payments from the wrist. Region dependent.

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Payment services

Zepp Pay3Press releasezepp.com/press-release/amazfit-t-rex-3-launches-at-ifa-berlin-redefining-adventure-for-modern-explorersRead 13 October 2026Zepp Pay.

Garmin Pay1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Ultra-wideband

Not available

Not available

Satellite

Not available

Not available

ANT+

No1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Note 17: connection to peripheral devices only supports devices with BLE connection. No ANT+ is listed.

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Audio

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Speaker

No1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Note 25: the watch has no built-in speaker. Music goes to Bluetooth headphones.

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Microphones

Not available

Not available

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

None1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026FAQ: the T-Rex 3 does not support Bluetooth phone calls but supports phone call notifications.

Phone only1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026Make calls and send texts via voice, with a paired phone

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

Yes1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Music Storage: Support. Only MP3 files, played through Bluetooth headphones.

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

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.

41Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Buttons: 4.

59Reviewdcrainmaker.com/2024/08/garmin-fenix-8-in-depth-review.htmlRead 30 September 20265 buttons as well as a touchscreen

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

UP, SELECT, BACK, DOWN2Owner's manualsupport.amazfit.com/en/amazfit_t-rex_3/files/user-manual.pdf.pdfRead 13 October 2026Upper right SELECT, lower right BACK, and UP and DOWN buttons.

Upper-left button, Middle-left button, Lower-left button, Upper-right button, Lower-right button12Owner's manualwww8.garmin.com/manuals/webhelp/GUID-EECCAC99-90D6-4AB1-9A3A-EC433D3365E2/EN-US/fenix_8_Series_OM_EN-US.pdfRead 30 September 2026Introduction > Button Functions, printed pages 6-7. These are the manual-published control names, not invented LIGHT/UP/BACK-LAP labels.

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

None2Owner's manualsupport.amazfit.com/en/amazfit_t-rex_3/files/user-manual.pdf.pdfRead 13 October 2026No crown is described. Controls are four buttons and the touchscreen.

None12Owner's manualwww8.garmin.com/manuals/webhelp/GUID-EECCAC99-90D6-4AB1-9A3A-EC433D3365E2/EN-US/fenix_8_Series_OM_EN-US.pdfRead 30 September 2026Device overview shows five control buttons with no rotating crown.

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

None2Owner's manualsupport.amazfit.com/en/amazfit_t-rex_3/files/user-manual.pdf.pdfRead 13 October 2026No rotating bezel is described.

Not available

Gestures

Not available

Not available

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.

700mAh1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Battery capacity 700 mAh (rated value).

Not available

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

AAmazfit T-Rex 3

Mode	With solar	Hours (h)
Smartwatch	No	648
Heavy use	No	312
Low power	No	960
Time only	No	1,944
GPS, dual-band	No	42
GPS, power saving	No	72
Extended GPS workout	No	114
Max battery GPS	No	180

Source1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Typical 27 days (648 h). Heavy 13 days (312 h). Battery saver 40 days (960 h). Clock mode 81 days (1944 h). Accuracy GPS 42 h (dual-frequency, all satellites, heart rate on). Power saving GPS 72 h (single frequency). GPS Long Battery Life Mode 114 h and GPS Max Battery Life 180 h, both only in Hiking and Climbing sports modes. The low temperature rows (28 h GPS on and 32 days GPS off) are not stored. Typical use conditions are in note 5.

BGarmin fēnix 8 AMOLED

Mode	With solar	Hours (h)
Smartwatch	No	240
Always-on	No	96
Low power	No	360
GPS	No	28
GPS, always-on display	No	22
GPS, all systems	No	23
GPS, all systems, always-on display	No	18
GPS, dual-band	No	21
GPS, dual-band, always-on display	No	16
GPS, all systems with music	No	6
Max battery GPS	No	49
Expedition	No	240

Source7Owner's manualwww8.garmin.com/manuals/webhelp/GUID-EECCAC99-90D6-4AB1-9A3A-EC433D3365E2/EN-US/GUID-40B16F18-75A1-4B3E-8F1A-AB4919BC9E51.htmlRead 30 September 2026AMOLED Battery Information table: All satellite systems with music. It is distinct from GPS-only with music. Gesture/AOD have the same 6/10/18 h limits for 43/47/51 mm.

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.

648h=CalculatedFrom Claimed battery life

240h=CalculatedFrom Claimed battery life

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

Not available

96h=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.

Not available

28h=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/amazfit-t-rex-3Read 13 October 2026Magnetic charging base. A review database lists two pogo pins, so the pins option is stored.

Proprietary plug1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026General > Charging method: Garmin proprietary plug charger. Neither magnetic pins nor USB-C 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

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.

180min1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Theoretical charging duration: approx. 3 hours, stored as 180 min.

Not available

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.

AAmazfit T-Rex 3

Not available

BGarmin fēnix 8 AMOLED

Test	Hours (h)
Mixed use, always-on	144

Source9Reviewdcrainmaker.com/2024/08/garmin-fenix-8-in-depth-review.htmlRead 30 September 2026Battery Testing: observed six days on 47 mm AMOLED with AOD, 1-2 h GPS per day in SatIQ. Not the 43 mm base. Partial GPS-discharge charts are not full-duration measurements.

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

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

22mm1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Strap width 22 mm.

20mm1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

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

Not available

Yes1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

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

Not available

QuickFit (20, 22 or 26 mm by case size)1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026QuickFit watch band compatible: included (20 mm on 43 mm, 22 mm on 47 mm, 26 mm on 51 mm)

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/amazfit-t-rex-3Read 13 October 2026Strap material: liquid silicone.

Silicone1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Strap

Standard liquid silicone strap1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026The store names no strap model. The spec table lists a liquid silicone strap.

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 T-Rex 3

Wrist (min) (mm)	Wrist (max) (mm)
145	210

Source1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Min and max wrist dimensions 145 mm to 210 mm.

BGarmin fēnix 8 AMOLED

Size	Wrist (min) (mm)	Wrist (max) (mm)
Silicone band	108	182
UltraFit band	108	189
Suede band	108	175
Metal band	108	180

Source1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026Fits wrists with the following circumference, per band type

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), Magnetic charging base (no USB Type-C cable), Instruction manual1Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Packing list: smartwatch (including standard strap), magnetic charging base (no USB Type-C cable), instruction manual.

fēnix 8 (43 mm, AMOLED) smartwatch, Charging/data cable, Documentation1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 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/amazfit-t-rex-3Read 13 October 2026Only the charging base is supplied. No mains adapter.

No1Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026The In the Box list has no power adapter

Links

Not compared

Product page

us.amazfit.com/products/amazfit-t-rex-31Maker product pageus.amazfit.com/products/amazfit-t-rex-3Read 13 October 2026Amazfit US product page.

www.garmin.com/en-US/p/12284931Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026

Spec sheet

Not available

www.garmin.com/en-US/p/12284931Maker product pagegarmin.com/en-US/p/1228493Read 30 September 2026Specifications tab in the public GarminAppBootstrap document, exact model SKUs checked.

Manual

support.amazfit.com/en/amazfit_t-rex_3/files/user-manual.pdf.pdf2Owner's manualsupport.amazfit.com/en/amazfit_t-rex_3/files/user-manual.pdf.pdfRead 13 October 2026Amazfit T-Rex 3 user manual, global version.

www8.garmin.com/manuals/webhelp/GUID-EECCAC99-90D6-4AB1-9A3A-EC433D3365E2/EN-US/fenix_8_Series_OM_EN-US.pdf7Owner's manualwww8.garmin.com/manuals/webhelp/GUID-EECCAC99-90D6-4AB1-9A3A-EC433D3365E2/EN-US/GUID-40B16F18-75A1-4B3E-8F1A-AB4919BC9E51.htmlRead 30 September 2026

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/amazfit-t-rex-3Read 13 October 2026Store banner: 1 year warranty. This is the US store.

Not available

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