Why is U1 better than U3?
- Screen size1.93″ vs 1.83″+5%
Why is U3 better than U1?
- Pixel density194 ppi vs 203 ppi+5%
Specifications
Side by side
| Design & durability | ||
| Case size | 50 mm | — |
| Weight | 43.8 g | — |
| Thickness | 11.4 mm | — |
| Height | 49.8 mm | — |
| Width | 42.4 mm | — |
| Water resistance | 1 ATM | — |
| Ingress protection | — | IP68 |
| Water resistance (IPx) | — | IPx8 |
| Colours | Black, Pink | Black, Silver, Pink |
| Display | ||
| Screen size | 1.93″ | 1.83″ |
| Display technology | LCD | LCD |
| Panel | TFT LCD | TFT |
| AMOLED / OLED display | No | No |
| Resolution (width) | 240 px | 240 px |
| Resolution (height) | 288 px | 284 px |
| Pixel density | 194 ppi | 203 ppi |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery capacity | 300 mAh | 300 mAh |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | — |
| Sensors | Accelerometer, gyro, heart rate, SpO2 | Accelerometer, heart rate |
| Sports & navigation | ||
| Built-in GPS | No | No |
| Connectivity | ||
| NFC payments | No | No |
| LTE (cellular) | No | No |
| eSIM | No | No |
| Bluetooth | 5.4 | 5.4 |
| Smart features | ||
| Speaker | Yes | Yes |
| Platform | ||
| Operating system | Proprietary OS | Proprietary OS |
| Platform | Proprietary | Proprietary |
