Amazfit T-Rex Ultra 2 vs Apple Watch Ultra 4
The T-Rex Ultra 2 costs $250 less and delivers 50 hours of GPS versus the Ultra 4's 18, and it works with Android. The Ultra 4 has ECG, Apple's max analytics tier, streaming music, a case 26 grams lighter, and a far more polished smartwatch experience, but only for iPhone users. Neither has an established rating yet.
AmazfitAmazfit T-Rex Ultra 2
AppleApple Watch Ultra 4
- •You want battery measured in days and dozens of GPS hours, not a few
- •You're on Android or want a cross-platform watch
- •You're on iPhone and want ECG and deeper analytics
- •A lighter, more polished smartwatch matters more than endurance
The T-Rex Ultra 2 is Amazfit's answer to the Fenix and the Apple Watch Ultra, at $549. It has preloaded full-color global maps with on-watch route planning, dual-band GPS, 64GB of storage, a dual-color flashlight, a speaker for Bluetooth calls, and 10 ATM water resistance with diving support to 45 meters. It's a big 51mm, 89-gram watch, and Amazfit's software and app ecosystem are still thinner than Garmin's.
The Ultra 4 keeps the titanium case and Action button of past Ultras, then pushes the display to 3,000 nits, dual-frequency GPS, and genuine offline maps with custom route creation. Training Load, VO2 max, running power, and satellite-based Emergency SOS round out a watch built as much for serious training as for the backcountry. It's still an iPhone-only watch, so it's not a fit if you're on Android, but for iOS runners who want real training data without leaving Apple's ecosystem, this is as good as Apple gets.
*Estimated — this model's exact GPS battery life isn't published by the manufacturer. All figures are standard GPS mode, midsize case, no solar boost.
†Estimated — this model launched too recently to have an established customer rating yet.
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