vs
4.1Display4.1
5.0Health tracking5.0
Dimensions
Size comparison
C21FW55 Aurum Pro
| C21 | FW55 Aurum Pro | Difference | |
|---|---|---|---|
| Height | 46.5 mm | 255 mm | −208.5 mm |
| Width | 46.5 mm | 38 mm | +8.5 mm |
| Thickness | 13 mm | 10 mm | +3 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is C21 better than FW55 Aurum Pro?
- Resolution (width)360 px vs 240 px+50%
- Battery capacity300 mAh vs 230 mAh+30%
Why is FW55 Aurum Pro better than C21?
- Built-in GPSNo · C21: Yes
- Screen size1.32″ vs 1.7″+29%
- Thickness13 mm vs 10 mm+30%
Specifications
Side by side
| Design & durability | ||
| Case size | 46 mm | — |
| Weight | — | 46 g |
| Thickness | 13 mm | 10 mm |
| Height | 46.5 mm | 255 mm |
| Width | 46.5 mm | 38 mm |
| Lens / cover glass | Corning Gorilla Glass | — |
| Strap material | — | Silikon |
| Ingress protection | IP68 | — |
| Water resistance (IPx) | IPx8 | — |
| Colours | Black, Silver | — |
| Display | ||
| Screen size | 1.32″ | 1.7″ |
| Display technology | LCD | — |
| Panel | TFT LCD | IPS |
| AMOLED / OLED display | No | No |
| Touchscreen | — | Yes |
| Resolution (width) | 360 px | 240 px |
| Resolution (height) | 360 px | 280 px |
| Pixel density | 386 ppi | — |
| Refresh rate | 60 Hz | — |
| Battery | ||
| Battery life (smartwatch mode) | — | 6 days |
| Battery capacity | 300 mAh | 230 mAh |
| Battery type | — | Li-Ion |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| Sleep tracking | — | Yes |
| Sensors | Accelerometer, heart rate, SpO2, blood pressure | heart rate, SpO2 |
| Sports & navigation | ||
| Built-in GPS | No | Yes |
| Satellite systems | — | GPS |
| Connectivity | ||
| NFC payments | No | — |
| LTE (cellular) | No | No |
| eSIM | No | — |
| Bluetooth | 5 | — |
| Smart features | ||
| Speaker | No | — |
| Platform | ||
| Operating system | Proprietary OS | — |
| Platform | Proprietary | — |
