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Wearable comparison

Amazfit T-Rex Ultra 2 vs Huawei Watch D3

Compare battery life, health tracking, display and fit.

Compared products
01Selected
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
02
Huawei Watch D3

Huawei Watch D3

  • 40 g.
  • 1.92 inch screen.
  • Unspecified processor.
  • Runs HarmonyOS.
  • Unspecified.
KSh 75,000Out of Stock

Add to comparison

2 spaces available

Apple Watch Ultra 3KSh 90,000
Samsung Galaxy Watch Ultra 2 47mmKSh 62,000
Apple Watch Ultra 4 49mmKSh 118,000
Google Pixel Watch 5 45mmKSh 64,000
Amazfit T-Rex 3 ProKSh 55,000
Apple Watch UltraKSh 90,000
Apple Watch Ultra 2KSh 103,500
2 of 4 products

Our quick verdict

The Huawei Watch D3 takes cuff-based blood-pressure readings, takes ECG heart-rhythm readings and is lighter to wear all day, though it is not water-resistant, while the Amazfit T-Rex Ultra 2 lasts longer between charges (30 days typical), gives daily recovery and BioCharge scores and is swimproof to 100 m.

Weight

Amazfit T-Rex Ultra 2
89.2 g
Huawei Watch D3
40 g

Display

Amazfit T-Rex Ultra 2
480 × 480 pixels, 322 ppi
Huawei Watch D3
408 × 480 pixels, PPI 328

Connections

Amazfit T-Rex Ultra 2
Wi-Fi 4, Bluetooth 5.2
Huawei Watch D3
Bluetooth 6.0

Software

Amazfit T-Rex Ultra 2
Works with the Zepp app
Huawei Watch D3
HarmonyOS

Storage

Amazfit T-Rex Ultra 2
Up to 64 GB storage
Huawei Watch D3
Unspecified

Key differences

The main differences to help you choose.

Amazfit T-Rex Ultra 2

  • Longer battery life: up to 30 days in typical use (vs 6).
  • Swimproof: water resistant to 100 m (the other is not water-resistant).
  • Daily recovery and BioCharge scores.
  • Rated for free diving to 45 m.

Huawei Watch D3

  • Cuff-based blood-pressure readings (built-in pump and inflatable strap).
  • Larger 1.92-inch screen (vs 1.5-inch).
  • Lighter: 40 g (vs 89.2 g).
  • ECG heart-rhythm readings.
  • Aluminium case and plastic back (vs plastic case).
  • Slimmer: 11.3 mm thick (vs 14.3 mm).

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.

6 priorities selected.
How each product answers the selected priorities
PriorityAmazfit T-Rex Ultra 2Huawei Watch D3
Battery life870 mAh batteryLasts up to 6 days in typical use or 1 day with ABPM enabled
Display1.5-inch OLED display, 322 ppi1.92-inch display
ConnectionsWi-Fi 4, Bluetooth 5.2Bluetooth 6.0
SoftwareWorks with the Zepp appHarmonyOS
StorageUp to 64 GB storageUnspecified
Water resistance10 ATMNo official water-resistance rating

Detailed comparison

Explore the full specifications, section by section.

Display

Display specifications comparison
SpecificationAmazfit T-Rex Ultra 2Huawei Watch D3
Display1.5-inch AMOLED1.92 inches
Screen resolution480 × 480 pixels, 322 ppi408 × 480 pixels, PPI 328
Display protectionSapphire glass—
Display featuresUp to 3,000 nits peak brightness; Always-On DisplayAMOLED, 3000 nits (peak)

Connectivity

Connectivity specifications comparison
SpecificationAmazfit T-Rex Ultra 2Huawei Watch D3
Wi-Fi2.4 GHz Wi-Fi (802.11 b/g/n)No Wi-Fi connectivity
BluetoothBluetooth 5.2 and BLE2.4 GHz, Bluetooth 6.0 supporting BR and BLE
Positioning / GNSSBuilt-in dual-band positioning; six satellite positioning systems; circularly polarised GPS antennaGPS
Network / cellular—No cellular connectivity
SIM / eSIM—No cellular connectivity
NFC—Yes (market/region dependent)
Ultra Wideband (UWB)—No
Satellite features—No

Identity & design

Identity & design specifications comparison
SpecificationAmazfit T-Rex Ultra 2Huawei Watch D3
BrandAmazfitHuawei
ModelAmazfit T-Rex Ultra 2Watch D3
Dimensions51 × 51 × 14.3 mm, excluding heart-rate sensor base46.5 x 41 x 11.3 mm (1.83 x 1.61 x 0.44 in)
Weight89.2 g with strap40 g (1.41 oz)
Build materialsFibre-reinforced polymer case; Grade 5 titanium bezel, buttons and back panelGlass front, aluminum frame, plastic back
Wrist size145–215 mm130-210 mm M-sized strap 130-160 mm L-sized strap 161-210 mm Strap width 25.5 mm
Strap / band26 mm silicone strap with classic pin buckleSand Composite Leather Strap White Composite Leather Strap Black HNBR Strap
Controls / buttonsFour physical buttons; sapphire-glass touchscreenRotating crown Function and ECG button
Announced—2026, September 02

Performance & software

Performance & software specifications comparison
SpecificationAmazfit T-Rex Ultra 2Huawei Watch D3
Storage64 GB total; 26.7 GB availableUnspecified
Processor—Unspecified
CPU—Unspecified
GPU—Unspecified
RAM—Unspecified
Operating system—HarmonyOS

Audio & communication

Audio & communication specifications comparison
SpecificationAmazfit T-Rex Ultra 2Huawei Watch D3
SpeakerSupportedYes
MicrophoneSupportedYes
CallingBluetooth calling and call/text notifications through a connected smartphoneYes

Sensors, health & fitness

Sensors, health & fitness specifications comparison
SpecificationAmazfit T-Rex Ultra 2Huawei Watch D3
SensorsBioTracker 6.0 PPG biometric sensor (5 photodiodes + 2 LEDs); accelerometer; gyroscope; geomagnetic sensor; barometric altimeter; ambient-light sensor; temperature sensor9-axis IMU sensor (Accelerometer sensor, Gyroscope sensor, Magnetometer sensor) Optical heart rate sensor ECG sensor Ambient light sensor Barometer sensor Temperature sensor Differential pressure sensor Hall sensor
Health & wellness features24-hour heart-rate, blood-oxygen, stress and skin-temperature monitoring; one-tap measurement; HybridCharge, BioCharge and LifeLoad energy insights; VO₂ Max and health alertsYes
Sleep trackingSleep HRV; sleep quality; stages including REM; daytime naps; sleep schedule; breathing quality; sleep score; RestoreIQ recovery insightsYes
Sports / workout modes187 sports modes; smart recognition of 25 strength-training movements and 8 sports movements; HYROX race and training modes100+ workout modes
Training & outdoor featuresZepp 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 sensorsYes
Safety & emergency featuresTwo-colour flashlight with SOS/Boost modes; storm, high-altitude blood-oxygen and route-deviation alertsNo
Diving / depth featuresFreediving and recreational scuba-diving support to 45 m; EN13319:2000, ISO 6425:2018 and GB/T 18828-2022 diving certifications; Bühlmann ZHL-16C decompression modelNo

Battery & durability

Battery & durability specifications comparison
SpecificationAmazfit T-Rex Ultra 2Huawei Watch D3
Battery capacity870 mAh rated—
Battery lifeTypical 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 hlasts up to 6 days in typical use or 1 day with ABPM enabled.
ChargingMagnetic charging head; DC 5 V 1.5 A maximum inputWireless charging
Water resistance10 ATM; tested to ISO 22810:2010Not water-resistant
Durability / certificationsMIL-STD-810H-2019; low-temperature operation down to −30 °C; SGS water-resistance test; certified diving standardsBlood Pressure Measurement & ECG with built-in pump & inflatable strap ECG certified Medical-grade and ambulatory blood pressure monitoring

Compatibility

Compatibility specifications comparison
SpecificationAmazfit T-Rex Ultra 2Huawei Watch D3
Phone compatibilityAndroid 7.0 or later; iOS 15.0 or laterAndroid 8.0 or later iOS 13.0 or later
Companion appZepp AppHuawei Health App
ColorsBlack MagmaMocha Gold, Gold, Black

Similarities

  • Both work with a companion app.
  • Both take calls over Bluetooth.
  • Both connect over Bluetooth.

In summary

Get the Huawei Watch D3 if you want cuff-based blood-pressure readings and ECG heart-rhythm readings, or the Amazfit T-Rex Ultra 2 if you would rather have longer battery life and daily recovery and BioCharge scores.

Back to compared products ↑

In-stock alternatives

Apple Watch UltraFor Amazfit T-Rex Ultra 2Apple Watch UltraView product ↗Apple Watch Ultra 3For Amazfit T-Rex Ultra 2Apple Watch Ultra 3View product ↗Apple Watch Series 12 46mmFor Huawei Watch D3Apple Watch Series 12 46mmView product ↗Google Pixel Watch 5 45mmFor Huawei Watch D3Google Pixel Watch 5 45mmView product ↗

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