Why is T-Rex 3 better than Watch JOY?
- Battery life (smartwatch mode)27 days vs 10 days2.7×
- Battery capacity700 mAh vs 380 mAh+84%
- Screen size1.5″ vs 1.43″+5%
- Resolution (width)480 px vs 466 px+3%
Why is Watch JOY better than T-Rex 3?
Watch JOY has no measurable advantages in this pair.
Specifications
Side by side
| Design & durability | ||
| Case size | 48 mm | — |
| Weight | 68.3 g | — |
| Thickness | 13.8 mm | — |
| Height | 48.5 mm | — |
| Width | 48.5 mm | — |
| Case material | Stainless steel | Plastic / polymer |
| Lens / cover glass | Gorilla Glass | — |
| Water resistance | 10 ATM | — |
| Display | ||
| Screen size | 1.5″ | 1.43″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Touchscreen | Yes | — |
| Resolution (width) | 480 px | 466 px |
| Resolution (height) | 480 px | 466 px |
| Pixel density | 322 ppi | — |
| Battery | ||
| Battery life (smartwatch mode) | 27 days | 10 days |
| Battery saver mode | 40 days | — |
| Battery capacity | 700 mAh | 380 mAh |
| Charging | Magnetic charging base | — |
| Health sensors | ||
| Optical heart rate | Yes | — |
| Blood oxygen (SpO2) | Yes | — |
| Temperature sensor | Yes | — |
| Sleep tracking | Yes | Yes |
| Sports & navigation | ||
| Built-in GPS | Yes | — |
| Dual-band GPS | Yes | — |
| Offline maps | Yes | — |
| Barometric altimeter | Yes | — |
| Compass | Yes | — |
| Sport profiles | 177 | — |
| Connectivity | ||
| LTE (cellular) | — | No |
| Wi-Fi | Wi-Fi 4 | — |
| Bluetooth | 5.2 | 5 |
| Smart features | ||
| Microphone | Yes | — |
| Voice assistant | Yes | — |
| Music on the watch | Yes | — |
| Platform | ||
| Platform | Proprietary | — |
| Works with | iOS, Android | iOS, Android |
