Dimensions
Size comparison
Watch S3Watch S4
| Watch S3 | Watch S4 | Difference | |
|---|---|---|---|
| Height | 47 mm | 47.3 mm | −0.3 mm |
| Width | 47 mm | 47.3 mm | −0.3 mm |
| Thickness | 12 mm | 12 mm | = |
| Weight | 44 g | 44 g | −0 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Watch S3 better than Watch S4?
Watch S3 has no measurable advantages in this pair.
Why is Watch S4 better than Watch S3?
- Peak brightness600 nits vs 2,200 nits3.7×
- Battery life (smartwatch mode)12 days vs 15 days+25%
Specifications
Side by side
| Design & durability | ||
| Case size | 47 mm | 47 mm |
| Weight | 44 g | 44.5 g |
| Thickness | 12 mm | 12 mm |
| Height | 47 mm | 47.3 mm |
| Width | 47 mm | 47.3 mm |
| Case material | Aluminium | Aluminium |
| Lens / cover glass | Scratch/drop-proof glass | Scratch/drop-proof glass |
| Strap material | Fluorelastomer | — |
| Water resistance | 5 ATM | 5 ATM |
| Water rating (maker) | 50 m / 5 bar / 5 ATM | 50 m / 5 bar / 5 ATM |
| Colours | Black, Silver, Brown | Black, Silver, Rainbow |
| Display | ||
| Screen size | 1.43″ | 1.43″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Touchscreen | Yes | Yes |
| Resolution (width) | 466 px | 466 px |
| Resolution (height) | 466 px | 466 px |
| Pixel density | 326 ppi | 326 ppi |
| Peak brightness | 600 nits | 2,200 nits |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery life (smartwatch mode) | 12 days | 15 days |
| Battery capacity | 486 mAh | 486 mAh |
| Battery type | Li-Po | Li-Po |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | Yes | Yes |
| Sleep tracking | — | Yes |
| Sensors | Accelerometer, gyro, compass, barometer, heart rate, SpO2 | Accelerometer, gyro, compass, barometer, heart rate, SpO2 |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Dual-band GPS | Yes | Yes |
| Satellite systems | GLONASS, GALILEO, BDS, QZSS | GLONASS, GALILEO, BDS, QZSS |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Connectivity | ||
| NFC payments | Yes | Yes |
| LTE (cellular) | Yes | Yes |
| eSIM | Yes | Yes |
| Bluetooth | 5.2 | 5.3 |
| Smart features | ||
| Calls from the wrist | — | Yes |
| Speaker | Yes | Yes |
| Platform | ||
| Operating system | HyperOS | HyperOS 2 |
| Platform | Proprietary | Proprietary |
| Works with | iOS, Android | iOS, Android |
