vs
9.2Display7.7
5.0Health tracking5.0
9.6Sports & outdoor4.7
8.6Build & durability4.3
Dimensions
Size comparison
Active 2 (Square)Watch S4
| Active 2 (Square) | Watch S4 | Difference | |
|---|---|---|---|
| Height | 36.9 mm | 47.3 mm | −10.4 mm |
| Width | 43.3 mm | 47.3 mm | −4 mm |
| Thickness | 9 mm | 12 mm | −3 mm |
| Weight | 31 g | 44 g | −13 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Active 2 (Square) better than Watch S4?
- Weight31.4 g vs 44.5 g+42%
- Screen size1.75″ vs 1.43″+22%
- Thickness9 mm vs 12 mm+33%
- Pixel density341 ppi vs 326 ppi+5%
Why is Watch S4 better than Active 2 (Square)?
- Battery life (smartwatch mode)10 days vs 15 days+50%
- Battery capacity260 mAh vs 486 mAh+87%
- Resolution (width)390 px vs 466 px+19%
Specifications
Side by side
| Design & durability | ||
| Case size | 43 mm | 47 mm |
| Weight | 31.4 g | 44.5 g |
| Thickness | 9 mm | 12 mm |
| Height | 36.9 mm | 47.3 mm |
| Width | 43.3 mm | 47.3 mm |
| Case material | Stainless steel | Aluminium |
| Sapphire crystal | Yes | — |
| Lens / cover glass | Sapphire glass | Scratch/drop-proof glass |
| Water resistance | 5 ATM | 5 ATM |
| Water rating (maker) | — | 50 m / 5 bar / 5 ATM |
| Colours | — | Black, Silver, Rainbow |
| Display | ||
| Screen size | 1.75″ | 1.43″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Touchscreen | Yes | Yes |
| Resolution (width) | 390 px | 466 px |
| Resolution (height) | 450 px | 466 px |
| Pixel density | 341 ppi | 326 ppi |
| Peak brightness | — | 2,200 nits |
| Refresh rate | — | 60 Hz |
| Battery | ||
| Battery life (smartwatch mode) | 10 days | 15 days |
| Battery saver mode | 19 days | — |
| GPS battery life | 21 h | — |
| Battery capacity | 260 mAh | 486 mAh |
| Battery type | — | Li-Po |
| Charging | Magnetic charging base | — |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | — | Yes |
| Temperature sensor | Yes | — |
| Sleep tracking | Yes | Yes |
| Sensors | — | Accelerometer, gyro, compass, barometer, heart rate, SpO2 |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Dual-band GPS | — | Yes |
| Satellite systems | — | GLONASS, GALILEO, BDS, QZSS |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Sport profiles | 160 | — |
| Connectivity | ||
| NFC payments | — | Yes |
| LTE (cellular) | — | Yes |
| eSIM | — | Yes |
| Bluetooth | 5.2 | 5.3 |
| Smart features | ||
| Calls from the wrist | Yes | Yes |
| Speaker | Yes | Yes |
| Microphone | Yes | — |
| Voice assistant | Yes | — |
| Platform | ||
| Operating system | — | HyperOS 2 |
| Platform | Proprietary | Proprietary |
| Works with | Android, iOS | iOS, Android |
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