vs
9.0Display8.1
4.9Health tracking4.9
Dimensions
Size comparison
FW66 Iron RStratos 3
| FW66 Iron R | Stratos 3 | Difference | |
|---|---|---|---|
| Height | 51 mm | 46.3 mm | +4.7 mm |
| Width | 45 mm | 46.3 mm | −1.3 mm |
| Thickness | 11 mm | 14.8 mm | −3.8 mm |
| Weight | 56 g | 60 g | −4 g |
Drawn to the same scale from the official dimensions (front and side).
Why is FW66 Iron R better than Stratos 3?
- Weight56 g vs 60 g+7%
- Thickness11 mm vs 14.8 mm+35%
Why is Stratos 3 better than FW66 Iron R?
- Battery life (smartwatch mode)14 days vs 20 days+43%
- Battery capacity300 mAh vs 400 mAh+33%
Specifications
Side by side
| Design & durability | ||
| Case size | 45 mm | 46 mm |
| Weight | 56 g | 60 g |
| Thickness | 11 mm | 14.8 mm |
| Height | 51 mm | 46.3 mm |
| Width | 45 mm | 46.3 mm |
| Case material | — | Plastic / polymer |
| Lens / cover glass | 2.5D-Glas Kristallglas | Chemisch verstärktes Glas |
| Strap material | Edelstahl, Silikon | — |
| Colours | Black | Black, Orange |
| Display | ||
| Screen size | 1.43″ | 1.43″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Touchscreen | — | Yes |
| Resolution (width) | 466 px | 466 px |
| Resolution (height) | 466 px | 466 px |
| Battery | ||
| Battery life (smartwatch mode) | 14 days | 20 days |
| Battery capacity | 300 mAh | 400 mAh |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | — | Yes |
| Sleep tracking | Yes | Yes |
| Sensors | heart rate, SpO2 | heart rate, SpO2, accelerometer |
| Sports & navigation | ||
| Built-in GPS | — | Yes |
| Satellite systems | — | GPS, GLONASS, GALILEO, BDS |
| Connectivity | ||
| LTE (cellular) | No | — |
| Bluetooth | — | 5.3 |
| Smart features | ||
| Music on the watch | Yes | — |
| Storage | 128 GB | — |
| Platform | ||
| Works with | — | iOS, Android |
| Chipset | RTL8763E | — |
