vs
6.8Display5.8
4.9Health tracking4.9
Dimensions
Size comparison
Pro 3 UltraSiona 2
| Pro 3 Ultra | Siona 2 | Difference | |
|---|---|---|---|
| Case size | 48 mm | 42 mm | +6 mm |
| Thickness | 12.2 mm | 6.9 mm | +5.3 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is Pro 3 Ultra better than Siona 2?
- Battery life (smartwatch mode)3 days vs 2 days+50%
- Battery capacity577 mAh vs 150 mAh3.8×
- Screen size1.4″ vs 1.3″+8%
Why is Siona 2 better than Pro 3 Ultra?
- Thickness12.2 mm vs 6.9 mm+77%
Specifications
Side by side
| Design & durability | ||
| Case size | — | 42 mm |
| Weight | 41 g | — |
| Thickness | 12.2 mm | 6.9 mm |
| Height | 47 mm | — |
| Width | 48 mm | — |
| Case material | Stainless steel | — |
| Lens / cover glass | Gorillaglas | — |
| Strap material | Kautschuk | — |
| Colours | Black | — |
| Display | ||
| Screen size | 1.4″ | 1.3″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Always-on display | — | Yes |
| Touchscreen | Yes | — |
| Resolution (width) | 454 px | — |
| Resolution (height) | 454 px | — |
| Battery | ||
| Battery life (smartwatch mode) | 3 days | 2 days |
| Battery life (hours) | 72 h | — |
| Battery capacity | 577 mAh | 150 mAh |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | — | Yes |
| Sleep tracking | Yes | Yes |
| Sensors | heart rate, SpO2, barometer, accelerometer | heart rate, SpO2, accelerometer |
| Sports & navigation | ||
| Built-in GPS | Yes | — |
| Satellite systems | GPS, GLONASS, GALILEO, BDS, QZSS | — |
| Barometric altimeter | Yes | — |
| Multisport / triathlon mode | Yes | Yes |
| Connectivity | ||
| NFC payments | Yes | — |
| Wi-Fi | Wi-Fi 4 | — |
| Bluetooth | 5 | 5 |
| Smart features | ||
| Speaker | Yes | — |
| Microphone | Yes | — |
| Music on the watch | Yes | — |
| Storage | 8 GB | — |
| RAM | 1 GB | — |
| Platform | ||
| Operating system | Wear OS by Google | — |
| Platform | Wear OS | — |
| Works with | — | iOS, Android |
| Chipset | Qualcomm Snapdragon Wear 4100 | — |
