Why is BT20 better than Watch S3?
- Screen size1.96″ vs 1.43″+37%
Why is Watch S3 better than BT20?
- Built-in GPSNo · BT20: Yes
- NFC paymentsNo · BT20: Yes
- LTE (cellular)No · BT20: Yes
- eSIMNo · BT20: Yes
- Battery capacity350 mAh vs 486 mAh+39%
- Resolution (width)410 px vs 466 px+14%
Specifications
Side by side
| Design & durability | ||
| Case size | — | 47 mm |
| Weight | — | 44 g |
| Thickness | — | 12 mm |
| Height | — | 47 mm |
| Width | — | 47 mm |
| Case material | — | Aluminium |
| Lens / cover glass | — | Scratch/drop-proof glass |
| Strap material | — | Fluorelastomer |
| Water resistance | 5 ATM | 5 ATM |
| Ingress protection | IP68 | — |
| Water resistance (IPx) | IPx8 | — |
| Water rating (maker) | — | 50 m / 5 bar / 5 ATM |
| Military-grade (MIL-STD-810) | Yes | — |
| Colours | Black | Black, Silver, Brown |
| Display | ||
| Screen size | 1.96″ | 1.43″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Touchscreen | — | Yes |
| Resolution (width) | 410 px | 466 px |
| Resolution (height) | 502 px | 466 px |
| Pixel density | 331 ppi | 326 ppi |
| Peak brightness | — | 600 nits |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery life (smartwatch mode) | — | 12 days |
| Battery capacity | 350 mAh | 486 mAh |
| Battery type | Li-Ion | Li-Po |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | — | Yes |
| Sensors | Accelerometer, heart rate, SpO2 | Accelerometer, gyro, compass, barometer, heart rate, SpO2 |
| Sports & navigation | ||
| Built-in GPS | No | Yes |
| Dual-band GPS | — | Yes |
| Satellite systems | — | GLONASS, GALILEO, BDS, QZSS |
| Barometric altimeter | — | Yes |
| Compass | — | Yes |
| Connectivity | ||
| NFC payments | No | Yes |
| LTE (cellular) | No | Yes |
| eSIM | No | Yes |
| Bluetooth | 5.2 | 5.2 |
| Smart features | ||
| Speaker | Yes | Yes |
| Platform | ||
| Operating system | Proprietary OS | HyperOS |
| Platform | Proprietary | Proprietary |
| Works with | — | iOS, Android |
