Why is T-Rex 3 better than Ring AIR?
- Battery life (smartwatch mode)27 days vs 6 days4.5×
Why is Ring AIR better than T-Rex 3?
- Weight68.3 g vs 2.4 g28.5×
Specifications
Side by side
| Design & durability | ||
| Case size | 48 mm | — |
| Weight | 68.3 g | 2.4 g |
| Thickness | 13.8 mm | — |
| Height | 48.5 mm | — |
| Width | 48.5 mm | — |
| Case material | Stainless steel | — |
| Lens / cover glass | Gorilla Glass | — |
| Water resistance | 10 ATM | 10 ATM |
| Water rating (maker) | — | 10 atm / 100 m |
| Display | ||
| Screen size | 1.5″ | — |
| Display technology | AMOLED | — |
| Panel | AMOLED | — |
| AMOLED / OLED display | Yes | — |
| Touchscreen | Yes | — |
| Resolution (width) | 480 px | — |
| Resolution (height) | 480 px | — |
| Pixel density | 322 ppi | — |
| Battery | ||
| Battery life (smartwatch mode) | 27 days | 6 days |
| Battery saver mode | 40 days | — |
| Battery capacity | 700 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 | — |
| Sensors | — | heart rate, SpO2, accelerometer |
| Sports & navigation | ||
| Built-in GPS | Yes | — |
| Dual-band GPS | Yes | — |
| Offline maps | Yes | — |
| Barometric altimeter | Yes | — |
| Compass | Yes | — |
| Sport profiles | 177 | — |
| Connectivity | ||
| Wi-Fi | Wi-Fi 4 | — |
| Bluetooth | 5.2 | — |
| Smart features | ||
| Microphone | Yes | — |
| Voice assistant | Yes | — |
| Music on the watch | Yes | — |
| Platform | ||
| Platform | Proprietary | — |
| Works with | iOS, Android | — |
