Kospet Tank M3: specs, who it fits and compatible phones

Kospet Tank M3 is a sport watch released in 2023 that works with iPhone and Android.
Specifications
| Release year | 2023 (approx.) · Archive |
|---|---|
| Case size | 53 mm (approx.) |
| Display | AMOLED (approx.) |
| Battery as listed | 15 days (approx.) |
| Water rating | 5ATM (approx.) |
| GPS type | Dual-band GNSS (approx.) |
| Operating system | KOSPET OS |
| Works with | iPhone and Android |
| Connection | No cellular connection |
| Plan needed | None |
| Health sensors | SpO2, Heart rate |
Archive label: released at least 30 months ago. This does not indicate current availability or support.
Who it fits
- Works with iPhone and Android.
How it compares
Closest models from Kospet
| Model | Release year | Case size | Battery as listed | Water rating | GPS type | Works with |
|---|---|---|---|---|---|---|
| Kospet Tank M3 Ultra | 2024 | 53 mm (approx.) | Up to 15 days | 5ATM · IP69K | Dual-band GNSS | iOS and Android |
| Kospet Tank T3 Ultra 2 | 2024 | 51 mm (approx.) | 470mAh · 12 days · 30-35 GPS hours (approx.) | 5ATM · IP69K | Dual-band GNSS | iOS and Android |
| Kospet Tank M4 | 2025 | 52 mm (approx.) | Up to 15 days regular use | 10ATM · IP69K | Dual-band GNSS | iOS and Android |
Closest models from other brands
| Model | Release year | Case size | Battery as listed | Water rating | GPS type | Works with |
|---|---|---|---|---|---|---|
| Mibro GS Explorer | 2024 | 47 mm (approx.) | Up to 20 days (approx.) | 10ATM | Dual-band GNSS (approx.) | iOS and Android |
| COROS PACE 3 | 2023 | 42 mm | 15 days with sleep + daily stress; 38 h Standard GPS | 5ATM | Dual-band GNSS | iOS and Android |
| Garmin Forerunner 965 | 2023 | Not listed | Up to 23 days · 31 hours GPS | 5ATM | Multi-system GNSS | iOS and Android |
Only values listed exactly are compared.
Phone compatibility and plan
No plan is listed as needed.
Sensors and features are listed as the maker names them and are not medical measurements.
Related guides and lists
- Battery life explained
- Phone compatibility
- Water resistance ratings
- Sensors explained
- Kospet smartwatches
- All models
Last verified September 26, 2026
Features change with updates. Check the maker's current details. See our methodology