Amazfit T-Rex Ultra vs Garmin Venu Sq 2
The Verdict
Amazfit T-Rex Ultra delivers exceptional battery endurance with up to 20 days of typical use and 80 hours of GPS operation, paired with a vibrant 454x454 AMOLED display and robust 10 ATM dive-certified water resistance. Garmin Venu Sq 2 counters with superior portability at just 38g versus 89g, broader connectivity features including NFC and Wi-Fi, and a more compact 1.41-inch form factor. Both feature SpO2 monitoring, heart rate tracking, and sleep analysis on AMOLED screens. Garmin's 11-day battery and 26-hour GPS fall short of Amazfit's endurance claims. For adventure athletes prioritizing rugged durability and multi-week battery life, the T-Rex Ultra justifies its $200 premium. However, those seeking daily wearability, contactless payments, and smart home control should choose the Venu Sq 2's lighter weight and connectivity ecosystem at a compelling $249 price point.
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 Garmin Venu Sq 2 if…
- →11-day battery life destroys Apple Watch and Galaxy Watch endurance
- →AMOLED display with always-on mode at an affordable price
- →Garmin's best-in-class GPS accuracy for running and cycling
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
Garmin Venu Sq 2
Pros
- 11-day battery life destroys Apple Watch and Galaxy Watch endurance
- AMOLED display with always-on mode at an affordable price
- Garmin's best-in-class GPS accuracy for running and cycling
- 25+ built-in sport modes with detailed workout analytics
- NFC for Garmin Pay contactless payments
Cons
- No ECG or skin temperature monitoring
- Square design is polarizing — not as elegant as round watches
- Garmin OS has far fewer third-party apps than Wear OS
- No cellular option — phone must be nearby for notifications
Full Specifications
| Spec | Amazfit T-Rex Ultra | Garmin Venu Sq 2 |
|---|---|---|
| Software | Zepp OS 2.0 | Garmin OS |
| Body | ||
| Weight | 89 g | 38 g |
| Case material | Stainless steel bezel, fiber-reinforced polymer case | Aluminum bezel, fiber-reinforced polymer |
| Water resistance | 10 ATM, ISO 22810 certified for free-diving to 45m | 5ATM |
| Health & Sensors | ||
| ECG | ||
| SpO₂ | ||
| Skin temperature | ||
| Heart rate | ||
| Sleep tracking | ||
| Battery | ||
| Battery life | Up to 20 days typical use, 80 hours GPS | Up to 11 days (smartwatch mode), 26 hrs GPS |
| Display | ||
| Size | 1.39 inch | 40 mm (1.41 inches) |
| Type | AMOLED | AMOLED |
| Always-on display | ||
| Resolution | 454 x 454 | 320 x 360 |
| Connectivity | ||
| GPS | ||
| NFC | ||
| Wi-Fi | ||
| Cellular | ||
| Bluetooth | 5.0 | 5.0 |
| Processor | ||
| Chipset | — | Garmin proprietary |
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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.
Explore more in smartwatches, see all Amazfit products or all Garmin products. View full details for the Amazfit T-Rex Ultra or the Garmin Venu Sq 2.