Dimensions
Size comparison
T-Rex 3T-Rex Pro
| T-Rex 3 | T-Rex Pro | Difference | |
|---|---|---|---|
| Case size | 48.5 mm | 47.7 mm | +0.8 mm |
| Thickness | 13.8 mm | 13.5 mm | +0.2 mm |
| Weight | 68 g | 59 g | +9 g |
Drawn to the same scale from the official dimensions (front and side).
Why is T-Rex 3 better than T-Rex Pro?
- Battery capacity700 mAh vs 390 mAh+79%
- Sport profiles177 vs 120+48%
Why is T-Rex Pro better than T-Rex 3?
- Screen size1.5″ vs 2″+33%
- Weight68.3 g vs 59.4 g+15%
- Pixel density322 ppi vs 598 ppi+86%
- Resolution (width)480 px vs 800 px+67%
Specifications
Side by side
| Design & durability | ||
| Case size | 48 mm | 48 mm |
| Weight | 68.3 g | 59.4 g |
| Thickness | 13.8 mm | 13.5 mm |
| Height | 48.5 mm | — |
| Width | 48.5 mm | — |
| Case material | Stainless steel | — |
| Lens / cover glass | Gorilla Glass | — |
| Water resistance | 10 ATM | 10 ATM |
| Military-grade (MIL-STD-810) | — | Yes |
| Display | ||
| Screen size | 1.5″ | 2″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Touchscreen | Yes | Yes |
| Resolution (width) | 480 px | 800 px |
| Resolution (height) | 480 px | 890 px |
| Pixel density | 322 ppi | 598 ppi |
| Battery | ||
| Battery life (smartwatch mode) | 27 days | — |
| Battery saver mode | 40 days | — |
| Battery capacity | 700 mAh | 390 mAh |
| Charging | 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 | Yes |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Sport profiles | 177 | 120 |
| Connectivity | ||
| NFC payments | — | Yes |
| Wi-Fi | Wi-Fi 4 | — |
| Bluetooth | 5.2 | 5 |
| Smart features | ||
| Microphone | Yes | — |
| Voice assistant | Yes | Yes |
| Music on the watch | Yes | — |
| Platform | ||
| Platform | Proprietary | Proprietary |
| Works with | iOS, Android | — |
