AmazFit T-Rex Ultra vs Huawei Watch D3
Compare specifications, current prices and availability. Choose up to four products from the same family.
Selected Item  AmazFit T-Rex Ultra Original price was: KSh 50,000.00.KSh 47,000.00Current price is: KSh 47,000.00. |
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Samsung Galaxy Watch UltraKSh 45,000.00
At a glance
Key specifications and important differences. Full details follow below.
| Feature | AmazFit T-Rex Ultra |  Huawei Watch D3 |
|---|---|---|
| Price | Original price was: KSh 50,000.00.KSh 47,000.00Current price is: KSh 47,000.00. | KSh 75,000.00 |
| Display | 1.39-inch AMOLED | 1.92 inches |
| Battery capacity | 500 mAh rated | — |
| Water resistance | 10 ATM; ISO 22810:2010 | Not water-resistant |
| Processor | — | Unspecified |
| RAM | — | Unspecified |
| Storage | Up to 2.3 GB available for music | Unspecified |
| Operating system | Zepp OS 3.5 | HarmonyOS |
| Network / cellular | — | No cellular connectivity |
| Positioning / GNSS | Built-in dual-band L1/L5 positioning; six satellite systems | GPS |
| Health & wellness features | 24-hour heart-rate, blood-oxygen and stress monitoring; one-tap measurement; PAI; breathing exercises; health alerts | Yes |
Full specifications
2 of 4 products
| Specification | AmazFit T-Rex Ultra | Huawei Watch D3 |
|---|---|---|
| Identity & design | ||
| Brand | Amazfit | Huawei |
| Model | Amazfit T-Rex Ultra | Watch D3 |
| Announced | — | 2026, September 02 |
| Dimensions | 47.3 × 47.3 × 13.45 mm, excluding heart-rate sensor base | 46.5 x 41 x 11.3 mm (1.83 x 1.61 x 0.44 in) |
| Weight | 89 g without strap | 40 g (1.41 oz) |
| Build materials | 316L stainless-steel bezel, back panel, bridge and buttons; polymer-alloy middle frame | Glass front, aluminum frame, plastic back |
| Wrist size | 140–205 mm | 130-210 mm M-sized strap 130-160 mm L-sized strap 161-210 mm Strap width 25.5 mm |
| Strap / band | 22 mm silicone strap with classic pin buckle | Sand Composite Leather Strap White Composite Leather Strap Black HNBR Strap |
| Controls / buttons | Four physical buttons; glass touchscreen | Rotating crown Function and ECG button |
| Display | ||
| Display | 1.39-inch AMOLED | 1.92 inches |
| Screen resolution | 454 × 454 pixels, 326 ppi | 408 × 480 pixels, PPI 328 |
| Display protection | Glass | — |
| Display features | Up to 1,000 nits; Always-On Display; 120+ watch faces | AMOLED, 3000 nits (peak) |
| Performance & software | ||
| Processor | — | Unspecified |
| CPU | — | Unspecified |
| GPU | — | Unspecified |
| RAM | — | Unspecified |
| Storage | Up to 2.3 GB available for music | Unspecified |
| Operating system | Zepp OS 3.5 | HarmonyOS |
| Connectivity | ||
| Network / cellular | — | No cellular connectivity |
| SIM / eSIM | — | No cellular connectivity |
| Wi-Fi | 2.4 GHz Wi-Fi | No Wi-Fi connectivity |
| Bluetooth | Bluetooth 5.0 BLE | 2.4 GHz, Bluetooth 6.0 supporting BR and BLE |
| NFC | — | Yes (market/region dependent) |
| Positioning / GNSS | Built-in dual-band L1/L5 positioning; six satellite systems | GPS |
| Ultra Wideband (UWB) | — | No |
| Satellite features | — | No |
| Audio & communication | ||
| Speaker | No built-in speaker; audio through connected Bluetooth headphones | Yes |
| Microphone | — | Yes |
| Calling | — | Yes |
| Sensors, health & fitness | ||
| Sensors | BioTracker PPG biometric sensor with SpO₂; accelerometer; gyroscope; geomagnetic sensor; barometric altimeter; ambient-light sensor | 9-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 features | 24-hour heart-rate, blood-oxygen and stress monitoring; one-tap measurement; PAI; breathing exercises; health alerts | Yes |
| Sleep tracking | Sleep stages including REM; naps; sleep schedule; breathing quality; sleep score | Yes |
| Sports / workout modes | 162 sports modes; smart recognition of 25 strength movements and 8 sports movements; freediving workouts | 100+ workout modes |
| Training & outdoor features | Offline maps and route navigation; Zepp Coach; PeakBeats; Track Run; trajectory correction; Virtual Pacer; training templates and intervals; external heart-rate belt and cycling power meter; altitude, sun, moon and tide tools | Yes |
| Safety & emergency features | Storm warnings; altitude blood-oxygen reminders; abnormal heart-rate, low-SpO₂ and high-stress alerts | No |
| Diving / depth features | Outdoor and indoor freediving and spearfishing; depth and water-temperature data; rated to 30 m; EN13319 and ISO 6425 diving certifications | No |
| Battery & durability | ||
| Battery capacity | 500 mAh rated | — |
| Battery life | Typical: up to 20 days; saver: 25 days; clock: 50 days; heavy: 9 days; accuracy GPS: 28 h; automatic GPS: 46 h; power-saving GPS: 58 h; endurance GPS: 80 h; low-temperature GPS: 10 h | lasts up to 6 days in typical use or 1 day with ABPM enabled. |
| Charging | Magnetic charging base; approximately 2 hours | Wireless charging |
| Water resistance | 10 ATM; ISO 22810:2010 | Not water-resistant |
| Durability / certifications | Mud-resistant design; ultra-low-temperature mode down to −30 °C; SGS-certified 10 ATM testing; EN13319 and ISO 6425 diving certifications | Blood Pressure Measurement & ECG with built-in pump & inflatable strap ECG certified Medical-grade and ambulatory blood pressure monitoring |
| Compatibility | ||
| Phone compatibility | Android 7.0 or later; iOS 12.0 or later | Android 8.0 or later iOS 13.0 or later |
| Companion app | Zepp App | Huawei Health App |
| Colors | Abyss Black; Sahara | Mocha Gold, Gold, Black |
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