Amazfit T-Rex Ultra vs Google Pixel Watch 3
Side-by-side specifications, scores and verdict.
Quick Verdict
Both smartwatches excel in distinct areas, making this choice context-dependent. Amazfit T-Rex Ultra dominates battery endurance with up to 20 days of typical use and 80 hours of GPS—ideal for adventurers and those prioritizing longevity between charges. Its AMOLED display delivers 454x454 resolution with true always-on capability, while comprehensive health tracking includes SpO2 and sleep monitoring. Google Pixel Watch 3 counters with superior software integration via Wear OS 5, faster Snapdragon W5+ processor, and additional health features including ECG and skin temperature monitoring. Its 2000-nit Actua display offers exceptional brightness, plus NFC and Wi-Fi connectivity for payments and app downloads. At 31g versus T-Rex Ultra's 89g, the Pixel Watch feels significantly lighter. Battery life (24-36 hours) trails considerably behind but covers typical daily use. Choose T-Rex Ultra for extended backcountry expeditions and battery longevity; select Pixel Watch 3 for seamless Android integration, advanced health insights, and refined daily performance.
Full Specifications
| Specification | Amazfit T-Rex Ultra | Google Pixel Watch 3 |
|---|---|---|
| Software | Zepp OS 2.0 | Wear OS 5 |
| Body | ||
| Weight | 89 g | 31 g (41mm, without band) |
| Case material | Stainless steel bezel, fiber-reinforced polymer case | Recycled aluminum |
| 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 24 hours with always-on display, up to 36 hours in Battery Saver |
| Display | ||
| Size | 1.39 inch | 41mm (1.2") |
| Type | AMOLED | LTPO AMOLED Actua, up to 2000 nits, 1Hz–60Hz |
| Always-on display | ||
| Resolution | 454 x 454 | 408 x 408 |
| Connectivity | ||
| GPS | ||
| NFC | ||
| Wi-Fi | ||
| Cellular | ||
| Bluetooth | 5.0 | 5.3 |
| Processor | ||
| RAM | — | 2 GB |
| Chipset | — | Qualcomm Snapdragon W5+ Gen 1 + Cortex M33 co-processor |
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
Google Pixel Watch 3
Pros
- Beautiful Actua display with 2000-nit peak brightness and slimmer bezels
- Now offered in two sizes (41mm and 45mm) for better fit options
- Deep Fitbit integration with advanced running form and cardio load metrics
- Loss of Pulse Detection feature can summon emergency help automatically
- Improved battery life over Pixel Watch 2, up to 36 hours in Battery Saver
Cons
- Battery life still trails Samsung and Apple Ultra-tier watches
- Some advanced Fitbit features require a Premium subscription
- Not repairable — Google won't repair damaged units
- Limited third-party app selection compared to Apple Watch
- Not compatible with iPhones
Related Comparisons
Explore more in smartwatches, see all Amazfit products or all Google products. View full details for the Amazfit T-Rex Ultra or the Google Pixel Watch 3.