Why is Inspire 3 better than Fit 21?
Inspire 3 has no measurable advantages in this pair.
Why is Fit 21 better than Inspire 3?
Fit 21 has no measurable advantages in this pair.
Specifications
Side by side
| Design & durability | ||
| Case size | 39 mm | — |
| Thickness | 11.8 mm | 12 mm |
| Height | 39.3 mm | — |
| Width | 18.6 mm | — |
| Strap material | Silikon | — |
| Water rating (maker) | — | 1 m |
| Colours | Black | Black |
| Display | ||
| Screen size | — | 1.54″ |
| Panel | — | Farbdisplay |
| AMOLED / OLED display | No | No |
| Always-on display | Yes | — |
| Touchscreen | Yes | — |
| Resolution (width) | — | 240 px |
| Resolution (height) | — | 240 px |
| Battery | ||
| Battery life (smartwatch mode) | 10 days | — |
| Battery capacity | — | 220 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, SpO2, accelerometer | heart rate, accelerometer |
| Connectivity | ||
| Bluetooth | — | 5 |
| Platform | ||
| Works with | iOS, Android | iOS, Android |
