5.8Display5.8
4.9Health tracking4.9
Dimensions
Size comparison
Siona 2Siona 2 Nano
| Siona 2 | Siona 2 Nano | Difference | |
|---|---|---|---|
| Case size | 42 mm | 37 mm | +5 mm |
| Thickness | 6.9 mm | 6.9 mm | = |
Drawn to the same scale from the official dimensions (front and side).
Why is Siona 2 better than Siona 2 Nano?
Siona 2 has no measurable advantages in this pair.
Why is Siona 2 Nano better than Siona 2?
- Battery life (smartwatch mode)2 days vs 6 days3×
Specifications
Side by side
| Design & durability | ||
| Case size | 42 mm | 37 mm |
| Thickness | 6.9 mm | 6.9 mm |
| Strap material | — | Edelstahl |
| Display | ||
| Screen size | 1.3″ | 1.3″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Always-on display | Yes | Yes |
| Battery | ||
| Battery life (smartwatch mode) | 2 days | 6 days |
| Battery capacity | 150 mAh | — |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | Yes | Yes |
| Sleep tracking | Yes | Yes |
| Sensors | heart rate, SpO2, accelerometer | heart rate, SpO2, accelerometer |
| Sports & navigation | ||
| Multisport / triathlon mode | Yes | Yes |
| Connectivity | ||
| Bluetooth | 5 | 5 |
| Platform | ||
| Works with | iOS, Android | iOS, Android |
