Amazfit T-Rex Ultra 2: A2550 · 51 mm · Black Magma · silicone strap
Apple Watch Ultra 4: A3579; 49 mm natural titanium; translucent gray Ocean Band
| Specification | Amazfit T-Rex Ultra 2 | Apple Watch Ultra 4 |
|---|---|---|
| Release year | 2026 | 2026 |
| Announcement / availability | 19 February 2026 Amazfit | 9 / 18 September 2026 Apple |
| Display | 1.5-inch AMOLED · 480 × 480 · sapphire glass Amazfit | LTPO3 OLED; 422 × 514 Apple |
| Peak brightness | Up to 3000 nits Amazfit | — |
| Body | Polymer case; Grade 5 titanium bezel, buttons and back Amazfit | — |
| Size / weight | 51 × 51 × 14.3 mm; 89.2 g with strap Amazfit | — |
| Strap | 26 mm silicone; 145–215 mm wrist Amazfit | — |
| Storage | 64 GB total; up to 26.7 GB user space Amazfit | 64 GB Apple |
| Positioning | Dual-band GNSS; six satellite systems Amazfit | Precision dual-frequency GNSS Apple |
| Sensors | BioTracker 6.0 PPG; barometer, compass, motion and temperature sensors Amazfit | — |
| Battery | 870 mAh; up to 30 typical / 15 heavy / 10 AOD days Amazfit | — |
| GPS battery modes | Up to 50 Accurate / 90 saving / 177 max-battery hours Amazfit | — |
| Wireless | Bluetooth 5.2 BLE; 2.4 GHz Wi-Fi Amazfit | Wi-Fi 4, 2.4/5 GHz; Bluetooth 5.3; UWB Apple |
| Water / diving | 10 ATM; recreational diving up to 45 m Amazfit | — |
| Phone connection | Android 7+ / iOS 15+; Zepp app Amazfit | — |
| Charging | Magnetic charging puck; USB-C cable separate Amazfit | About 45 minutes to 80% Apple |
| Calls | Bluetooth calls using microphone/speaker Amazfit | — |
| Case | — | Grade 5 titanium; sapphire front crystal Apple |
| Size | — | 49 × 44 × 12 mm Apple |
| Weight | — | Natural titanium case 63 g Apple |
| Brightness | — | 1 nit minimum; 3000 nits peak Apple |
| Chip | — | S11; dual-core 64-bit Apple |
| Health sensors | — | Electrical/optical heart; blood oxygen; temperature Apple |
| Outdoor sensors | — | Depth, water temperature, compass, altimeter Apple |
| Cellular | — | A3579: 5G RedCap and LTE Apple |
| Manufacturer battery test | — | Up to 50 hours normal use; 84 in Low Power Mode Apple |
| Water / dust | — | 100 m rating; IP6X Apple |
| Diving limit | — | Recreational diving to 40 m Apple |
| Phone compatibility | — | iPhone 11 / SE 2 or later; iOS 27+ Apple |