Dimensions
Size comparison
T-Rex 2T-Rex 3
| T-Rex 2 | T-Rex 3 | Difference | |
|---|---|---|---|
| Height | 47.1 mm | 48.5 mm | −1.4 mm |
| Width | 47.1 mm | 48.5 mm | −1.4 mm |
| Thickness | 13.6 mm | 13.8 mm | −0.1 mm |
| Weight | 66 g | 68 g | −2 g |
Drawn to the same scale from the official dimensions (front and side).
Why is T-Rex 2 better than T-Rex 3?
- Weight66.5 g vs 68.3 g+3%
Why is T-Rex 3 better than T-Rex 2?
- Battery life (smartwatch mode)24 days vs 27 days+12%
- Screen size1.39″ vs 1.5″+8%
- Battery capacity500 mAh vs 700 mAh+40%
- Sport profiles158 vs 177+12%
- Resolution (width)454 px vs 480 px+6%
Specifications
Side by side
| Design & durability | ||
| Case size | 47 mm | 48 mm |
| Weight | 66.5 g | 68.3 g |
| Thickness | 13.6 mm | 13.8 mm |
| Height | 47.1 mm | 48.5 mm |
| Width | 47.1 mm | 48.5 mm |
| Case material | Plastic / polymer | Stainless steel |
| Lens / cover glass | Glass material | Gorilla Glass |
| Water resistance | 10 ATM | 10 ATM |
| Display | ||
| Screen size | 1.39″ | 1.5″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Touchscreen | Yes | Yes |
| Resolution (width) | 454 px | 480 px |
| Resolution (height) | 454 px | 480 px |
| Pixel density | 326 ppi | 322 ppi |
| Battery | ||
| Battery life (smartwatch mode) | 24 days | 27 days |
| Battery saver mode | — | 40 days |
| GPS battery life | 50 h | — |
| GPS battery life (dual-band) | 26 h | — |
| Battery capacity | 500 mAh | 700 mAh |
| Charging | Magnetic 2-pin pogo pin | Magnetic charging base |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| Temperature sensor | — | Yes |
| Sleep tracking | Yes | 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 | 158 | 177 |
| Connectivity | ||
| Wi-Fi | — | Wi-Fi 4 |
| Bluetooth | 5 | 5.2 |
| Smart features | ||
| Microphone | — | Yes |
| Voice assistant | — | Yes |
| Music on the watch | — | Yes |
| Platform | ||
| Platform | Proprietary | Proprietary |
| Works with | — | iOS, Android |
