2.1Display5.8
Dimensions
Size comparison
Flex SmartSiona 2
| Flex Smart | Siona 2 | Difference | |
|---|---|---|---|
| Case size | 44 mm | 42 mm | +2 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is Flex Smart better than Siona 2?
Flex Smart has no measurable advantages in this pair.
Why is Siona 2 better than Flex Smart?
- AMOLED / OLED displayNo · Flex Smart: Yes
- Screen size1.1″ vs 1.3″+18%
Specifications
Side by side
| Design & durability | ||
| Case size | 44 mm | 42 mm |
| Thickness | — | 6.9 mm |
| Strap material | Silikon, Edelstahl | — |
| Colours | Silver, Red | — |
| Display | ||
| Screen size | 1.1″ | 1.3″ |
| Display technology | LCD | AMOLED |
| Panel | LCD | AMOLED |
| AMOLED / OLED display | No | Yes |
| Always-on display | — | Yes |
| Battery | ||
| Battery life (smartwatch mode) | — | 2 days |
| Battery capacity | 150 mAh | 150 mAh |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | — | Yes |
| ECG | — | Yes |
| Sleep tracking | — | Yes |
| Sensors | — | heart rate, SpO2, accelerometer |
| Sports & navigation | ||
| Multisport / triathlon mode | — | Yes |
| LED flashlight | Yes | — |
| Connectivity | ||
| Bluetooth | 2 | 5 |
| Platform | ||
| Works with | iOS, Android | iOS, Android |
