Why is U3 better than Watch D3?
U3 has no measurable advantages in this pair.
Why is Watch D3 better than U3?
- Built-in GPSNo · U3: Yes
- AMOLED / OLED displayNo · U3: Yes
- NFC paymentsNo · U3: Yes
- Resolution (width)240 px vs 408 px+70%
- Screen size1.83″ vs 1.92″+5%
- Pixel density203 ppi vs 328 ppi+62%
Specifications
Side by side
| Design & durability | ||
| Case size | — | 46 mm |
| Weight | — | 40 g |
| Thickness | — | 11.3 mm |
| Height | — | 46.5 mm |
| Width | — | 41 mm |
| Case material | — | Aluminium |
| Lens / cover glass | — | 2.5D-Glas |
| Strap material | — | Textil |
| Ingress protection | IP68 | — |
| Water resistance (IPx) | IPx8 | — |
| Colours | Black, Silver, Pink | Black, Gold |
| Display | ||
| Screen size | 1.83″ | 1.92″ |
| Display technology | LCD | AMOLED |
| Panel | TFT | AMOLED |
| AMOLED / OLED display | No | Yes |
| Always-on display | — | Yes |
| Resolution (width) | 240 px | 408 px |
| Resolution (height) | 284 px | 480 px |
| Pixel density | 203 ppi | 328 ppi |
| Peak brightness | — | 3,000 nits |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery life (smartwatch mode) | — | 6 days |
| Battery capacity | 300 mAh | — |
| Wireless charging | — | Yes |
| Charging | — | kabellos, magnetische Ladeschale |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | — | Yes |
| ECG | — | Yes |
| Skin temperature | — | Yes |
| Temperature sensor | — | Yes |
| Sleep tracking | — | Yes |
| Sensors | Accelerometer, heart rate | Accelerometer, gyro, compass, heart rate, SpO2, thermometer (skin temperature), differential pressure sensor, barometer |
| Sports & navigation | ||
| Built-in GPS | No | Yes |
| Barometric altimeter | — | Yes |
| Compass | — | Yes |
| Connectivity | ||
| NFC payments | No | Yes |
| LTE (cellular) | No | No |
| eSIM | No | No |
| Bluetooth | 5.4 | 6 |
| Smart features | ||
| Speaker | Yes | Yes |
| Platform | ||
| Operating system | Proprietary OS | HarmonyOS |
| Platform | Proprietary | HarmonyOS |
| Works with | — | iOS, Android |
