vs
9.7Display8.0
9.0Battery life7.2
9.6Health tracking4.9
9.5Sports & outdoor6.0
8.6Build & durability6.3
Dimensions
Size comparison
T-Rex 3 ProT-Rex Ultra
| T-Rex 3 Pro | T-Rex Ultra | Difference | |
|---|---|---|---|
| Height | 48 mm | 47.3 mm | +0.7 mm |
| Width | 48 mm | 47.3 mm | +0.7 mm |
| Thickness | 14 mm | 13.4 mm | +0.6 mm |
| Weight | 74 g | 89 g | −14 g |
Drawn to the same scale from the official dimensions (front and side).
Why is T-Rex 3 Pro better than T-Rex Ultra?
- GPS battery life85 h vs 46 h+85%
- Battery life (smartwatch mode)25 days vs 20 days+25%
- Weight74.5 g vs 89 g+19%
- Screen size1.5″ vs 1.39″+8%
- Pixel density466 ppi vs 326 ppi+43%
- Battery capacity700 mAh vs 500 mAh+40%
- GPS battery life (dual-band)38 h vs 28 h+36%
- Resolution (width)480 px vs 454 px+6%
Why is T-Rex Ultra better than T-Rex 3 Pro?
- Thickness14 mm vs 13.4 mm+4%
Specifications
Side by side
| Design & durability | ||
| Case size | 48 mm | — |
| Weight | 74.5 g | 89 g |
| Thickness | 14 mm | 13.4 mm |
| Height | 48 mm | 47.3 mm |
| Width | 48 mm | 47.3 mm |
| Case material | Plastic / polymer | Plastic / polymer |
| Sapphire crystal | Yes | — |
| Lens / cover glass | Sapphire glass | — |
| Water resistance | 10 ATM | 10 ATM |
| Display | ||
| Screen size | 1.5″ | 1.39″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Touchscreen | Yes | Yes |
| Resolution (width) | 480 px | 454 px |
| Resolution (height) | 480 px | 454 px |
| Pixel density | 466 ppi | 326 ppi |
| Peak brightness | 3,000 nits | — |
| Battery | ||
| Battery life (smartwatch mode) | 25 days | 20 days |
| Battery saver mode | — | 25 days |
| GPS battery life | 85 h | 46 h |
| GPS battery life (dual-band) | 38 h | 28 h |
| Battery capacity | 700 mAh | 500 mAh |
| Charging | — | Magnetic charging base |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| Skin temperature | Yes | — |
| Temperature sensor | Yes | — |
| Sleep tracking | Yes | — |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Dual-band GPS | Yes | Yes |
| Offline maps | Yes | — |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Sport profiles | 180 | — |
| LED flashlight | Yes | — |
| Connectivity | ||
| Wi-Fi | Wi-Fi 4 | Wi-Fi 4 |
| Bluetooth | 5.2 | 5 |
| Smart features | ||
| Calls from the wrist | Yes | — |
| Speaker | Yes | — |
| Microphone | Yes | — |
| Voice assistant | Yes | — |
| Music on the watch | Yes | — |
| Platform | ||
| Operating system | — | Zepp OS |
| Platform | Proprietary | Proprietary |
| Works with | Android, iOS | iOS, Android |
