Amazfit T-Rex Ultra 2 / Apple Watch Ultra (49 mm, 1st generation)

Amazfit T-Rex Ultra 2: A2550 · 51 mm · Black Magma · silicone strap

Apple Watch Ultra (49 mm, 1st generation): Apple Watch Ultra, 49 mm natural titanium case, GPS + Cellular. The Apple Watch Ultra 2 and Ultra 3 are separate models.

Specification	Amazfit T-Rex Ultra 2	Apple Watch Ultra (49 mm, 1st generation)
Release year	2026	2022
Announcement / availability	19 February 2026 Amazfit	—
Display	1.5-inch AMOLED · 480 × 480 · sapphire glass Amazfit	LTPO2 OLED always-on Retina; 410 × 502 pixels; 1185 mm² display area; up to 2000 nits LTPO lets the refresh rate drop very low, so the screen can stay on without draining the battery. 2000 nits was twice as bright as any earlier Apple Watch display. Apple
Peak brightness	Up to 3000 nits With auto brightness; unavailable in low-temperature mode or below 30% battery. Amazfit	—
Body	Polymer case; Grade 5 titanium bezel, buttons and back Amazfit	—
Size / weight	51 × 51 × 14.3 mm; 89.2 g with strap Thickness excludes heart-rate sensor base. 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	—
Battery	870 mAh; up to 30 typical / 15 heavy / 10 AOD days Separate manufacturer scenarios, not continuous GPS endurance. Amazfit	Up to 36 hours; up to 18 hours with LTE; USB-C magnetic fast-charging cable Runtime depends on display, workout and cellular use; using LTE away from the phone drains the battery noticeably faster. Apple
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 Not for technical, cave or mixed-gas diving. 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 and glass	—	49 mm natural titanium case; flat sapphire front crystal; ceramic and sapphire back The flat front crystal is protected by a raised titanium edge. Apple
Chip	—	S8 SiP with 64-bit dual-core processor; W3 wireless chip; U1 Ultra Wideband chip; 32 GB storage Availability of Ultra Wideband features varies by country. Apple
Location and navigation	—	Dual-frequency GPS (L1 and L5), GLONASS, Galileo, QZSS, BeiDou; compass; always-on altimeter The L5 signal helps separate signals reflected by tall buildings and trees; Apple called it the most accurate GPS of any Apple Watch at the time. Apple
Health sensors	—	Electrical heart sensor (ECG); third-generation optical heart sensor; blood oxygen sensor Availability of the ECG and blood oxygen apps varies by country. Apple
Diving and water	—	WR100 (ISO 22810); dive-ready to 40 metres (EN 13319); water temperature sensor and depth gauge; IP6X dust Apple points to the third-party Oceanic+ app for recreational scuba diving to 40 metres; the watch itself is not certified as a dive computer. Apple
Safety	—	86-decibel emergency siren; Fall and Crash Detection (high-g accelerometer up to 256 g); Emergency SOS The siren plays two distinct patterns, one signalling distress and one mimicking SOS. Apple
Connectivity	—	LTE and UMTS; Wi-Fi 802.11b/g/n 2.4 and 5 GHz; Bluetooth 5.3 With cellular, the watch can make calls and get messages without the phone nearby; carrier support is required. Apple
Low-power setting	—	Up to 60 hours Apple announced that this setting would arrive in software after launch, in autumn 2022; it extends runtime by taking some readings less often. Apple
Operating temperature	—	−20 °C to 55 °C on the wrist Apple
Weight	—	61.3 g (without band) Apple
Compatibility	—	iPhone 8 or later with iOS 16 or later The watch can only be set up and used with an iPhone; it does not pair with Android phones. Apple