Why is U3 better than GTS 4?
- Battery capacity300 mAh vs 260 mAh+15%
Why is GTS 4 better than U3?
- AMOLED / OLED displayNo · U3: Yes
- Resolution (width)240 px vs 466 px+94%
- Screen size1.83″ vs 1.94″+6%
Specifications
Side by side
| Design & durability | ||
| Case size | — | 47 mm |
| Thickness | — | 8.7 mm |
| Case material | — | Plastic / polymer |
| Strap material | — | Silikon |
| Ingress protection | IP68 | — |
| Water resistance (IPx) | IPx8 | — |
| Colours | Black, Silver, Pink | — |
| Display | ||
| Screen size | 1.83″ | 1.94″ |
| Display technology | LCD | AMOLED |
| Panel | TFT | AMOLED |
| AMOLED / OLED display | No | Yes |
| Resolution (width) | 240 px | 466 px |
| Resolution (height) | 284 px | 466 px |
| Pixel density | 203 ppi | — |
| Refresh rate | 60 Hz | — |
| Battery | ||
| Battery life (smartwatch mode) | — | 7 days |
| Battery capacity | 300 mAh | 260 mAh |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | — | Yes |
| Sleep tracking | — | Yes |
| Sensors | Accelerometer, heart rate | heart rate, SpO2, accelerometer |
| Sports & navigation | ||
| Built-in GPS | No | — |
| Connectivity | ||
| NFC payments | No | — |
| LTE (cellular) | No | — |
| eSIM | No | — |
| Bluetooth | 5.4 | 5.2 |
| Smart features | ||
| Speaker | Yes | — |
| Platform | ||
| Operating system | Proprietary OS | — |
| Platform | Proprietary | — |
| Works with | — | iOS, Android |
