Why is 4 better than Gen2?
4 has no measurable advantages in this pair.
Why is Gen2 better than 4?
- Battery life (smartwatch mode)7 days vs 10 days+43%
Specifications
Side by side
| Design & durability | ||
| Weight | 3 g | 3 g |
| Water resistance | 10 ATM | 10 ATM |
| Water rating (maker) | 10 atm / 100 m | 10 atm / 100 m |
| Battery | ||
| Battery life (smartwatch mode) | 7 days | 10 days |
| Health sensors | ||
| Optical heart rate | Yes | — |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | Yes | — |
| Skin temperature | — | Yes |
| Sensors | SpO2, accelerometer | SpO2, accelerometer |
