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Wearable comparison

Amazfit T-Rex 3 Pro vs Amazfit T-Rex Ultra 2

Compare battery life, health tracking, display and fit.

Compared products
01Selected
Amazfit T-Rex 3 Pro

Amazfit T-Rex 3 Pro

  • Runs Zepp OS 6.
  • 1.5-inch OLED display, 322 ppi.
  • 48 mm: 700 mAh.
  • Bluetooth 5.2.
  • 10 ATM.
KSh 55,000In Stock
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02
Amazfit T-Rex Ultra 2

Amazfit T-Rex Ultra 2

  • 89.2 g.
  • Screen: 480 × 480 pixels, 322 ppi.
  • Wi-Fi 4 support.
  • 870 mAh battery capacity.
  • Up to 64 GB storage.
KSh 85,000Out of Stock

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Apple Watch Series 11KSh 51,000
Samsung Galaxy Watch Ultra 2 47mmKSh 62,000
WHOOP Life MGKSh 50,000
Google Pixel Watch 5 45mmKSh 64,000
WHOOP LifeKSh 55,500
AmazFit FalconKSh 63,000
AmazFit T-Rex UltraKSh 47,000
2 of 4 products

Our quick verdict

The Amazfit T-Rex Ultra 2 lasts longer between charges (30 days typical) and gives daily recovery and BioCharge scores, while the Amazfit T-Rex 3 Pro is lighter to wear all day and syncs with apps such as Strava.

Portability

Amazfit T-Rex 3 Pro
52 g
Amazfit T-Rex Ultra 2
89.2 g

Software

Amazfit T-Rex 3 Pro
Zepp OS 6
Amazfit T-Rex Ultra 2
Works with the Zepp app

Connections

Amazfit T-Rex 3 Pro
Bluetooth 5.2
Amazfit T-Rex Ultra 2
Wi-Fi 4, Bluetooth 5.2

Battery capacity

Amazfit T-Rex 3 Pro
48 mm: 700 mAh
Amazfit T-Rex Ultra 2
870 mAh battery

Sleep tracking

Amazfit T-Rex 3 Pro
Sleep stages including REM, naps
Amazfit T-Rex Ultra 2
Sleep HRV, sleep quality

Key differences

The main differences to help you choose.

Amazfit T-Rex 3 Pro

  • Lighter: 52 g (vs 89.2 g).
  • Syncs with third-party apps such as Strava and Apple Health.

Amazfit T-Rex Ultra 2

  • Longer battery life: up to 30 days in typical use (vs 25).
  • Longer sport-mode battery: up to 50 hours in GPS: mode (vs 38 hours in GPS mode).
  • Daily recovery and BioCharge scores.

What matters most to you?

Choose any priorities

How each product answers the questions buyers ask most. Tick a topic to add it, untick one to hide it.

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6 priorities selected.
How each product answers the selected priorities
PriorityAmazfit T-Rex 3 ProAmazfit T-Rex Ultra 2
Battery life48 mm: 25 days typical, 10 days heavy, 38 hours accurate GPS870 mAh battery
Portability52 g89.2 g
SoftwareZepp OS 6Works with the Zepp app
Display1.5-inch OLED display, 322 ppi1.5-inch OLED display, 322 ppi
ConnectionsBluetooth 5.2Wi-Fi 4, Bluetooth 5.2
Battery capacity48 mm: 700 mAh870 mAh battery

Detailed comparison

Explore the full specifications, section by section.

Display

Display specifications comparison
SpecificationAmazfit T-Rex 3 ProAmazfit T-Rex Ultra 2
Display48 mm: 1.5-inch; 44 mm: 1.32-inch AMOLED1.5-inch AMOLED
Screen resolution48 mm: 480 × 480 pixels, 322 ppi; 44 mm: 466 × 466 pixels, 353 ppi480 × 480 pixels, 322 ppi
Display protectionSapphire glassSapphire glass
Display features—Up to 3,000 nits peak brightness; Always-On Display

Connectivity

Connectivity specifications comparison
SpecificationAmazfit T-Rex 3 ProAmazfit T-Rex Ultra 2
Wi-FiWi-Fi 2.4 GHz2.4 GHz Wi-Fi (802.11 b/g/n)
BluetoothBluetooth 5.2 BLEBluetooth 5.2 and BLE
Positioning / GNSSDual-band GNSS; 6 satellite systems; circularly polarized antennaBuilt-in dual-band positioning; six satellite positioning systems; circularly polarised GPS antenna

Identity & design

Identity & design specifications comparison
SpecificationAmazfit T-Rex 3 ProAmazfit T-Rex Ultra 2
BrandAmazfitAmazfit
ModelAmazfit T-Rex 3 ProAmazfit T-Rex Ultra 2
Dimensions48 mm: 48 × 48 × 14 mm; 44 mm: 44.8 × 44.8 × 13.2 mm, without heart-rate sensor base51 × 51 × 14.3 mm, excluding heart-rate sensor base
Weight48 mm: 52 g; 44 mm: 46.8 g, without strap89.2 g with strap
Build materialsFibre-reinforced polymer case; Grade 5 titanium bezel and buttonsFibre-reinforced polymer case; Grade 5 titanium bezel, buttons and back panel
Wrist size48 mm: 145–210 mm; 44 mm: 140–205 mm145–215 mm
Strap / band48 mm: 22 mm; 44 mm: 20 mm silicone quick-release strap; pin buckle26 mm silicone strap with classic pin buckle
Controls / buttons4 physical buttons; touchscreenFour physical buttons; sapphire-glass touchscreen

Performance & software

Performance & software specifications comparison
SpecificationAmazfit T-Rex 3 ProAmazfit T-Rex Ultra 2
Operating systemZepp OS 6—
Storage—64 GB total; 26.7 GB available

Audio & communication

Audio & communication specifications comparison
SpecificationAmazfit T-Rex 3 ProAmazfit T-Rex Ultra 2
SpeakerSupportedSupported
MicrophoneSupportedSupported
CallingBluetooth callingBluetooth calling and call/text notifications through a connected smartphone

Sensors, health & fitness

Sensors, health & fitness specifications comparison
SpecificationAmazfit T-Rex 3 ProAmazfit T-Rex Ultra 2
SensorsBioTracker 6.0 PPG; accelerometer; gyroscope; geomagnetic sensor; barometric altimeter; ambient light; temperatureBioTracker 6.0 PPG biometric sensor (5 photodiodes + 2 LEDs); accelerometer; gyroscope; geomagnetic sensor; barometric altimeter; ambient-light sensor; temperature sensor
Health & wellness features24-hour heart rate, SpO₂ and stress; one-tap measurement; PAI; breathing exercises; high and low heart-rate alerts; low SpO₂ alerts; high-altitude SpO₂ reminders; skin temperature; HybridCharge24-hour heart-rate, blood-oxygen, stress and skin-temperature monitoring; one-tap measurement; HybridCharge, BioCharge and LifeLoad energy insights; VO₂ Max and health alerts
Sleep trackingSleep stages including REM; naps; sleep breathing quality; sleep scoreSleep HRV; sleep quality; stages including REM; daytime naps; sleep schedule; breathing quality; sleep score; RestoreIQ recovery insights
Sports / workout modes187 sports modes187 sports modes; smart recognition of 25 strength-training movements and 8 sports movements; HYROX race and training modes
Training & outdoor featuresZepp Coach; PeakBeats; training templates; interval training; track running; trajectory correction; virtual pacer; offline maps; turn-by-turn navigation; route import; return navigation; route-deviation alerts; altitude assistant; compass; sunrise and sunset; moon phase; tides; storm warnings; contour and ski maps; POI search; route planning; round-trip routing; auto rerouting; HYROX Virtual PaceZepp Coach; PeakBeats; lactate threshold, Training Stress Balance, Training Load and Training Effect; offline maps; on-watch route planning, automatic rerouting, POI search, turn-by-turn navigation; golf maps; external heart-rate, running-power and cycling sensors
Diving / depth featuresFreediving to 45 m; recreational scuba-diving modeFreediving and recreational scuba-diving support to 45 m; EN13319:2000, ISO 6425:2018 and GB/T 18828-2022 diving certifications; Bühlmann ZHL-16C decompression model
Safety & emergency features—Two-colour flashlight with SOS/Boost modes; storm, high-altitude blood-oxygen and route-deviation alerts

Battery & durability

Battery & durability specifications comparison
SpecificationAmazfit T-Rex 3 ProAmazfit T-Rex Ultra 2
Battery capacity48 mm: 700 mAh; 44 mm: 500 mAh, rated870 mAh rated
Battery life48 mm: 25 days typical, 10 days heavy, 38 hours accurate GPS, 74 hours GPS power saver; 44 mm: 17 days typical, 8 days heavy, 26 hours accurate GPS, 51 hours GPS power saverTypical use: up to 30 days; heavy use: 15 days; AOD: 10 days; accurate GPS: 50 h; power-saving GPS: 90 h; maximum GPS: 177 h; low-temperature mode with GPS: 40 h
ChargingMagnetic charging headMagnetic charging head; DC 5 V 1.5 A maximum input
Water resistance10 ATM10 ATM; tested to ISO 22810:2010
Durability / certificationsRugged outdoor construction with Grade 5 titanium controls and sapphire glassMIL-STD-810H-2019; low-temperature operation down to −30 °C; SGS water-resistance test; certified diving standards

Compatibility

Compatibility specifications comparison
SpecificationAmazfit T-Rex 3 ProAmazfit T-Rex Ultra 2
Phone compatibilityAndroid 7 or later; iOS 15 or laterAndroid 7.0 or later; iOS 15.0 or later
Companion appZeppZepp App
Colors48 mm: Tactical Black, Black Gold; 44 mm: Arctic Gold, Black GoldBlack Magma

Additional specifications

Additional specifications specifications comparison
SpecificationAmazfit T-Rex 3 ProAmazfit T-Rex Ultra 2
Case materialFibre-reinforced polymer; Grade 5 titanium bezel—
FlashlightRed and white LED flashlight—
Pixels per inch48 mm: 322 ppi; 44 mm: 353 ppi—
Peak brightness3,000 nits peak—
Packing listWatch with standard strap; magnetic charging head; instruction manual—
Smart recognition25 strength-training movements; 8 sports movements—
Third-party fitness appsStrava; adidas Running; TrainingPeaks; komoot; Relive; Google Fit; Apple Health—

Similarities

  • Both use Bluetooth 5.2.
  • Both have a plastic case.
  • Both are rated for free diving to 45 m.
  • Both are water resistant to 100 m.
  • Both take calls over Bluetooth.
  • Both have OLED displays.

In summary

For most buyers the Amazfit T-Rex Ultra 2 is the better buy; the Amazfit T-Rex 3 Pro makes sense if you want a lighter watch for all-day wear.

Back to compared products ↑

In-stock alternatives

WHOOP LifeFor Amazfit T-Rex 3 ProWHOOP LifeView product ↗Apple Watch Series 11For Amazfit T-Rex 3 ProApple Watch Series 11View product ↗Google Pixel Watch 5 45mmFor Amazfit T-Rex Ultra 2Google Pixel Watch 5 45mmView product ↗Samsung Galaxy Watch Ultra 2 47mmFor Amazfit T-Rex Ultra 2Samsung Galaxy Watch Ultra 2 47mmView product ↗

Related comparisons

Amazfit T-Rex 3 ProApple Watch Series 11Amazfit T-Rex 3 ProSamsung Galaxy Watch Ultra 2 47mmAmazfit T-Rex 3 ProWHOOP Life MGAmazfit T-Rex 3 ProGoogle Pixel Watch 5 45mmAmazfit T-Rex 3 ProWHOOP LifeAmazFit FalconAmazfit T-Rex 3 ProAmazFit T-Rex UltraAmazfit T-Rex 3 ProAmazfit T-Rex 3 ProAmazfit Balance 3Amazfit T-Rex 3 ProHuawei Watch 6 Pro 46 mm
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