Why is U3 better than Watch X5i?
U3 has no measurable advantages in this pair.
Why is Watch X5i better than U3?
- AMOLED / OLED displayNo · U3: Yes
- Screen size1.83″ vs 1.97″+8%
- Resolution (width)240 px vs 390 px+62%
- Pixel density203 ppi vs 302 ppi+49%
- Battery capacity300 mAh vs 420 mAh+40%
Specifications
Side by side
| Design & durability | ||
| Case size | — | 47 mm |
| Weight | — | 28 g |
| Thickness | — | 10.9 mm |
| Height | — | 46.7 mm |
| Width | — | 40.5 mm |
| Case material | — | Plastic / polymer |
| Strap material | — | Silikon |
| Water resistance | — | 1 ATM |
| Ingress protection | IP68 | IP68 |
| Water resistance (IPx) | IPx8 | IPx8 |
| Water rating (maker) | — | 1 ATM |
| Colours | Black, Silver, Pink | Black, White |
| Display | ||
| Screen size | 1.83″ | 1.97″ |
| Display technology | LCD | AMOLED |
| Panel | TFT | AMOLED |
| AMOLED / OLED display | No | Yes |
| Resolution (width) | 240 px | 390 px |
| Resolution (height) | 284 px | 450 px |
| Pixel density | 203 ppi | 302 ppi |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery life (smartwatch mode) | — | 21 days |
| Battery capacity | 300 mAh | 420 mAh |
| Battery type | — | Li-Po |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | — | Yes |
| Sleep tracking | — | Yes |
| Sensors | Accelerometer, heart rate | Accelerometer, heart rate, SpO2 |
| 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 |
| Microphone | — | Yes |
| Platform | ||
| Operating system | Proprietary OS | RTOS OS |
| Platform | Proprietary | Proprietary |
| Works with | — | iOS, Android |
