Amazfit T-Rex Ultra 2: A2550 · 51 mm · Black Magma · silicone strap
Samsung Galaxy Watch Ultra (47 mm, 2024): Galaxy Watch Ultra 47 mm (SM-L705, LTE); Titanium Gray, Titanium White and Titanium Silver at launch. The Galaxy Watch Ultra (2025), sold with a Titanium Blue option, is a later release of the same design whose specifications are not applied to this record; the Galaxy Watch Ultra2 and Galaxy Watch7 are separate models.
| Specification | Amazfit T-Rex Ultra 2 | Samsung Galaxy Watch Ultra (47 mm, 2024) |
|---|---|---|
| Release year | 2026 | 2024 |
| Announcement / availability | 19 February 2026 Amazfit | — |
| Display | 1.5-inch AMOLED · 480 × 480 · sapphire glass Amazfit | 1.5-inch (37.3 mm) 480 × 480 Super AMOLED; full-colour Always On Display; Sapphire Crystal Samsung |
| 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 | — |
| Positioning | Dual-band GNSS; six satellite systems Amazfit | — |
| Sensors | BioTracker 6.0 PPG; barometer, compass, motion and temperature sensors Amazfit | Samsung BioActive Sensor (Optical Bio-signal sensor + Electrical Heart Signal + Bioelectrical Impedance Analysis), temperature, accelerometer, barometer, gyro, geomagnetic, light sensor Samsung |
| 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 | — |
| 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 | — |
| Calls | Bluetooth calls using microphone/speaker Amazfit | — |
| Case | — | 47.1 × 47.4 × 12.1 mm; 60.5 g; Titanium Grade 4 frame Samsung |
| Processor | — | Exynos W1000 (5 core, 3 nm) Samsung |
| Memory and storage | — | 2 GB memory + 32 GB storage Samsung |
| Battery and charging | — | 590 mAh (typical); up to 100 hours in Power Saving and 48 hours in Exercise Power Saving; WPC-based fast wireless charging Samsung |
| Operating system | — | Wear OS 5 (Powered by Samsung) with One UI 6 Watch at launch; One UI 8 Watch update released in July 2025 Samsung |
| Connectivity | — | LTE, Bluetooth 5.3, Wi‑Fi 2.4+5 GHz, NFC, GPS (L1+L5) / Glonass / Beidou / Galileo Samsung |
| Durability | — | 10ATM + IP68, MIL-STD-810H; ocean swimming; operation from −20 to 55 °C; altitude from 500 m below sea level to 9,000 m Samsung |
| Buttons and safety | — | Two buttons + orange Quick Button; Emergency Siren Samsung |
| Phone compatibility | — | Android 11 or higher with more than 1.5 GB of memory Samsung |