Dimensions
Size comparison
Watch 4Watch S3
| Watch 4 | Watch S3 | Difference | |
|---|---|---|---|
| Height | 45.3 mm | 47 mm | −1.7 mm |
| Width | 39.1 mm | 47 mm | −7.9 mm |
| Thickness | 11.2 mm | 12 mm | −0.8 mm |
| Weight | 32 g | 44 g | −12 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Watch 4 better than Watch S3?
- Weight32 g vs 44 g+38%
- Screen size1.75″ vs 1.43″+22%
- Thickness11.2 mm vs 12 mm+7%
- Pixel density340 ppi vs 326 ppi+4%
Why is Watch S3 better than Watch 4?
- Battery life (smartwatch mode)10 days vs 12 days+20%
- Resolution (width)390 px vs 466 px+19%
- Battery capacity451 mAh vs 486 mAh+8%
Specifications
Side by side
| Design & durability | ||
| Case size | 45 mm | 47 mm |
| Weight | 32 g | 44 g |
| Thickness | 11.2 mm | 12 mm |
| Height | 45.3 mm | 47 mm |
| Width | 39.1 mm | 47 mm |
| Case material | Plastic / polymer | Aluminium |
| Lens / cover glass | — | Scratch/drop-proof glass |
| Strap material | Silikon | Fluorelastomer |
| Water resistance | 5 ATM | 5 ATM |
| Water rating (maker) | 50 m / 5 bar / 5 ATM | 50 m / 5 bar / 5 ATM |
| Colours | Black, Gold | Black, Silver, Brown |
| Display | ||
| Screen size | 1.75″ | 1.43″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Always-on display | Yes | — |
| Touchscreen | — | Yes |
| Resolution (width) | 390 px | 466 px |
| Resolution (height) | 450 px | 466 px |
| Pixel density | 340 ppi | 326 ppi |
| Peak brightness | — | 600 nits |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery life (smartwatch mode) | 10 days | 12 days |
| Battery capacity | 451 mAh | 486 mAh |
| Battery type | Li-Ion | Li-Po |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | Yes | Yes |
| Sleep tracking | Yes | — |
| Sensors | Accelerometer, gyro, heart rate, SpO2 | Accelerometer, gyro, compass, barometer, heart rate, SpO2 |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Dual-band GPS | — | Yes |
| Satellite systems | GLONASS, GALILEO, BDS, QZSS | GLONASS, GALILEO, BDS, QZSS |
| Barometric altimeter | — | Yes |
| Compass | — | Yes |
| Multisport / triathlon mode | Yes | — |
| Connectivity | ||
| NFC payments | Yes | Yes |
| LTE (cellular) | Yes | Yes |
| eSIM | Yes | Yes |
| Bluetooth | 5.2 | 5.2 |
| Smart features | ||
| Speaker | Yes | Yes |
| Storage | 4 GB | — |
| RAM | 0.031 GB | — |
| Platform | ||
| Operating system | MagicOS 7.2 | HyperOS |
| Platform | Proprietary | Proprietary |
| Works with | iOS, Android | iOS, Android |
