Amazfit T-Rex Ultra vs Apple Watch Ultra 2
Apple Watch Ultra 2 delivers superior health monitoring with ECG and skin temperature tracking unavailable on the T-Rex Ultra, plus faster performance via the S9 chip and broader connectivity including NFC, Wi-Fi, and cellular. Its 3000-nit LTPO2 OLED display outshines the T-Rex's 1.39-inch AMOLED screen in brightness and responsiveness. However, Amazfit T-Rex Ultra excels in battery endurance—20 days typical use versus 36 hours—and weighs significantly less at 89g. Both handle diving admirably with appropriate certifications. Amazfit's price point ($449.99) offers remarkable value for fitness-focused users prioritizing battery life, while Apple's ($799) justifies premium pricing through comprehensive health features, ecosystem integration, and advanced processing. Choose the Ultra 2 for comprehensive health insights and daily convenience; select the T-Rex Ultra if multi-week battery life and rugged durability matter most.
Full Specifications
| Spec | Amazfit T-Rex Ultra | Apple Watch Ultra 2 |
|---|---|---|
| Software | Zepp OS 2.0 | watchOS 10 |
| Body | ||
| Weight | 89 g | 61.4 g |
| Case material | Stainless steel bezel, fiber-reinforced polymer case | Titanium |
| Water resistance | 10 ATM, ISO 22810 certified for free-diving to 45m | WR100 (100m) + IP6X dust + EN13319 dive certified |
| Health & Sensors | ||
| ECG | ||
| SpO₂ | ||
| Skin temperature | ||
| Heart rate | ||
| Sleep tracking | ||
| Battery | ||
| Battery life | Up to 20 days typical use, 80 hours GPS | Up to 36 hours normal use, up to 72 hours in Low Power Mode |
| Display | ||
| Size | 1.39 inch | 49mm |
| Type | AMOLED | LTPO2 OLED Always-On Retina, up to 3000 nits |
| Always-on display | ||
| Resolution | 454 x 454 | 502 x 410 |
| Connectivity | ||
| GPS | ||
| NFC | ||
| Wi-Fi | ||
| Cellular | ||
| Bluetooth | 5.0 | 5.3 |
| Processor | ||
| RAM | — | 1 GB |
| Chipset | — | Apple S9 SiP (64-bit dual-core) |
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
Apple Watch Ultra 2
Pros
- Extremely bright 3000-nit display readable in direct sunlight
- Rugged titanium case with MIL-STD certification and dive certification to 40m
- Best-in-class battery life for an Apple Watch at up to 36 hours
- Dual-frequency precision GPS (L1 + L5) for accurate tracking
- On-device Siri processing and double-tap gesture via Apple S9 chip
Cons
- Very expensive at $799 starting price
- Only one large 49mm case size, too big for smaller wrists
- Still requires daily charging for heavy users
- No blood oxygen feature on units sold in the US (post-ban)
- Locked into the Apple ecosystem, requires an iPhone
Related Comparisons
Explore more in smartwatches, see all Amazfit products or all Apple products. View full details for the Amazfit T-Rex Ultra or the Apple Watch Ultra 2.