Why is Fit 21 better than JR-FV2?
- Screen size1.54″ vs 1.43″+8%
Why is JR-FV2 better than Fit 21?
- AMOLED / OLED displayNo · Fit 21: Yes
- Resolution (width)240 px vs 466 px+94%
- Battery capacity220 mAh vs 300 mAh+36%
Specifications
Side by side
| Design & durability | ||
| Case size | — | 48 mm |
| Thickness | 12 mm | — |
| Water rating (maker) | 1 m | — |
| Colours | Black | Silver |
| Display | ||
| Screen size | 1.54″ | 1.43″ |
| Display technology | — | AMOLED |
| Panel | Farbdisplay | AMOLED |
| AMOLED / OLED display | No | Yes |
| Resolution (width) | 240 px | 466 px |
| Resolution (height) | 240 px | 466 px |
| Battery | ||
| Battery life (smartwatch mode) | — | 12 days |
| Battery capacity | 220 mAh | 300 mAh |
| Battery type | Li-Ion | — |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | — | Yes |
| ECG | Yes | — |
| Sleep tracking | Yes | Yes |
| Sensors | heart rate, accelerometer | heart rate, SpO2 |
| Connectivity | ||
| Bluetooth | 5 | — |
| Platform | ||
| Works with | iOS, Android | — |
