Why is R1 better than 4?
R1 has no measurable advantages in this pair.
Why is 4 better than R1?
- Battery life (smartwatch mode)4 days vs 7 days+75%
- Water resistance5 ATM vs 10 ATM2×
Specifications
Side by side
| Design & durability | ||
| Weight | — | 3 g |
| Water resistance | 5 ATM | 10 ATM |
| Water rating (maker) | 5 atm / 50 m | 10 atm / 100 m |
| Colours | Grey | — |
| Battery | ||
| Battery life (smartwatch mode) | 4 days | 7 days |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | — | Yes |
| Skin temperature | Yes | — |
| HRV tracking | Yes | — |
| Sensors | heart rate, SpO2 | SpO2, accelerometer |
