Amazfit T-Rex Ultra vs Samsung Galaxy Watch 5 Pro
The Verdict
Samsung Galaxy Watch 5 Pro delivers superior health monitoring with ECG and skin temperature sensors absent on the Amazfit T-Rex Ultra, plus comprehensive connectivity including NFC, Wi-Fi, and cellular options. Its titanium construction weighs just 46.5g compared to the T-Rex Ultra's 89g, making it significantly more comfortable for daily wear. Amazfit counters with exceptional battery endurance,up to 20 days versus Samsung's 28 hours,and deeper water resistance rated for free-diving to 45 meters. Display quality matches closely with both featuring AMOLED screens at similar resolutions. Software differs fundamentally: Wear OS 3.5 ecosystem offers vastly more apps and customization than Zepp OS 2.0's more limited environment. At virtually identical pricing, the Galaxy Watch 5 Pro suits users prioritizing comprehensive health data and smartphone integration, while the T-Rex Ultra appeals to outdoor enthusiasts and those seeking multi-week battery life. For most users, Samsung's feature-richness and lighter design make it the stronger choice.
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 Samsung Galaxy Watch 5 Pro if…
- →Titanium case with sapphire crystal is extremely rugged and premium
- →590 mAh battery delivers genuine multi-day battery life
- →GPX route import and track-back navigation for outdoor adventures
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
Samsung Galaxy Watch 5 Pro
Pros
- Titanium case with sapphire crystal is extremely rugged and premium
- 590 mAh battery delivers genuine multi-day battery life
- GPX route import and track-back navigation for outdoor adventures
- Full health sensor suite matches the Galaxy Watch 5
- MIL-STD-810H handles extreme conditions
Cons
- Large 45mm case is bulky on smaller wrists
- No rotating bezel — touch bezel is less satisfying
- Titanium adds weight at 46.5 g — heavier than Apple Watch Ultra
- ECG and blood pressure locked to Samsung phones
Full Specifications
| Spec | Amazfit T-Rex Ultra | Samsung Galaxy Watch 5 Pro |
|---|---|---|
| Software | Zepp OS 2.0 | Wear OS 3.5 (One UI Watch 4.5) |
| Body | ||
| Weight | 89 g | 46.5 g |
| 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, MIL-STD-810H |
| Health & Sensors | ||
| ECG | ||
| SpO₂ | ||
| Skin temperature | ||
| Heart rate | ||
| Sleep tracking | ||
| Battery | ||
| Battery life | Up to 20 days typical use, 80 hours GPS | Up to 80 hrs (typical ~48 hrs) |
| Display | ||
| Size | 1.39 inch | 45mm |
| Type | AMOLED | Super AMOLED |
| Always-on display | ||
| Resolution | 454 x 454 | 450 x 450 |
| Connectivity | ||
| GPS | ||
| NFC | ||
| Wi-Fi | ||
| Cellular | ||
| Bluetooth | 5.0 | 5.2 |
| Processor | ||
| Chipset | — | Exynos W920 |
Related Comparisons
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 Samsung products. View full details for the Amazfit T-Rex Ultra or the Samsung Galaxy Watch 5 Pro.