vs
8.5Display8.2
4.9Health tracking4.9
3.3Build & durability3.3
Why is Tank X2 Ultra better than Stratos 4?
- Screen size1.64″ vs 1.43″+15%
Why is Stratos 4 better than Tank X2 Ultra?
- Battery life (smartwatch mode)10 days vs 18 days+80%
- Battery capacity290 mAh vs 500 mAh+72%
Specifications
Side by side
| Design & durability | ||
| Case size | — | 49 mm |
| Weight | 60 g | 60 g |
| Thickness | — | 14 mm |
| Height | — | 46.3 mm |
| Width | — | 46.3 mm |
| Case material | — | Plastic / polymer |
| Lens / cover glass | Gorilla Glas | Gorilla Glas |
| Strap material | Silikon | Silikon |
| Water resistance | 5 ATM | 5 ATM |
| Water rating (maker) | 50 m / 5 bar / 5 ATM | 50 m / 5 bar / 5 ATM |
| Colours | — | Black |
| Display | ||
| Screen size | 1.64″ | 1.43″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Always-on display | Yes | — |
| Touchscreen | — | Yes |
| Resolution (width) | — | 466 px |
| Resolution (height) | — | 466 px |
| Battery | ||
| Battery life (smartwatch mode) | 10 days | 18 days |
| Battery capacity | 290 mAh | 500 mAh |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | Yes | Yes |
| Sleep tracking | — | Yes |
| Sensors | heart rate, SpO2 | heart rate, SpO2, accelerometer |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Satellite systems | GPS | GPS, GLONASS, GALILEO, BDS |
| Connectivity | ||
| Bluetooth | 5.3 | 5.3 |
| Platform | ||
| Works with | iOS, Android | iOS, Android |
