Amazfit T-Rex Ultra vs Huawei Watch GT 3 Pro
The Verdict
Both watches excel in different areas, making this more nuanced than a straightforward choice. The Amazfit T-Rex Ultra prioritizes ruggedness and battery longevity with its 89g stainless steel and fiber-reinforced polymer construction rated for 10 ATM diving certification and 20-day battery life under typical use. Its 1.39-inch AMOLED display at 454 x 454 resolution is bright and responsive. However, it skips ECG monitoring and skin temperature tracking, limiting comprehensive health insights. The Huawei Watch GT 3 Pro counterbalances with a premium titanium case weighing just 54g, sapphire crystal glass protection, and a more comprehensive health suite including ECG, SpO2, skin temperature, and sleep tracking. Its 466 x 466 AMOLED display is marginally sharper, while 14-day battery life remains impressive despite slightly trailing the T-Rex Ultra. NFC and Bluetooth 5.2 connectivity edge ahead of the Amazfit's 5.0. At $80 less, the T-Rex Ultra appeals to outdoor adventurers and battery-conscious users willing to sacrifice health features. The GT 3 Pro ($369) suits health-focused users preferring premium materials and comprehensive biometric data. Choose the T-Rex Ultra for extreme durability and battery endurance; select the GT 3 Pro for health monitoring completeness and lighter weight.
Who Should Buy
Buy the Amazfit T-Rex Ultra if…
- →Excellent 20-day battery life with always-on display
- →Dual-band six-satellite GPS for high accuracy
- →Rugged design with 15 military-grade certifications
Buy the Huawei Watch GT 3 Pro if…
- →Premium titanium and sapphire crystal construction is luxurious
- →14-day battery life is outstanding for an AMOLED smartwatch
- →ECG and skin temperature monitoring for comprehensive health tracking
Category Scores
Pros & Cons
Amazfit T-Rex Ultra
Pros
- Excellent 20-day battery life with always-on display
- Dual-band six-satellite GPS for high accuracy
- Rugged design with 15 military-grade certifications
- Free-diving rated to 45 meters
- Offline maps with route import support
Cons
- No ECG, skin temperature, or NFC payments
- No Wi-Fi or cellular connectivity
- Zepp OS app ecosystem is limited
- Heavier than most smartwatches at 89g
- No third-party app store
Huawei Watch GT 3 Pro
Pros
- Premium titanium and sapphire crystal construction is luxurious
- 14-day battery life is outstanding for an AMOLED smartwatch
- ECG and skin temperature monitoring for comprehensive health tracking
- Sapphire crystal is extremely scratch resistant
- Dual-band GPS for accurate outdoor tracking
Cons
- HarmonyOS has very limited third-party app support
- No Google Play Store or Apple App Store access
- No cellular option — requires phone for notifications
- Limited compatibility with iOS — best with Huawei phones
- NFC payments are region-restricted
Full Specifications
| Spec | Amazfit T-Rex Ultra | Huawei Watch GT 3 Pro |
|---|---|---|
| Software | Zepp OS 2.0 | HarmonyOS 2.0 |
| Body | ||
| Weight | 89 g | 54 g (without strap) |
| Case material | Stainless steel bezel, fiber-reinforced polymer case | Titanium with sapphire crystal glass |
| Water resistance | 10 ATM, ISO 22810 certified for free-diving to 45m | 5ATM (IP68) |
| Health & Sensors | ||
| ECG | ||
| SpO₂ | ||
| Skin temperature | ||
| Heart rate | ||
| Sleep tracking | ||
| Battery | ||
| Battery life | Up to 20 days typical use, 80 hours GPS | Up to 14 days |
| Display | ||
| Size | 1.39 inch | 46mm |
| Type | AMOLED | AMOLED Always-On |
| Always-on display | ||
| Resolution | 454 x 454 | 466 x 466 |
| Connectivity | ||
| GPS | ||
| NFC | ||
| Wi-Fi | ||
| Cellular | ||
| Bluetooth | 5.0 | 5.2 |
| Processor | ||
| Chipset | — | Huawei custom SoC |
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This comparison is based on verified manufacturer specifications covering display, performance, camera, battery, and build quality. Scores are generated by analyzing specs across weighted categories on a 10-point scale. Learn more about our methodology.
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