Xiaomi Watch S4 41mm: specs, who it fits and compatible phones
Xiaomi Watch S4 41mm is a smartwatch released in 2025 that works with iPhone and Android. It lists Dual-band GNSS, 5ATM and SpO2, HRV.
Specifications
| Release year | 2025 |
|---|---|
| Case size | 41 mm |
| Display | AMOLED |
| Brightness | 1500 nits |
| Battery as listed | Up to 8 days light use · 4 days regular |
| Water rating | 5ATM |
| Case material | Stainless steel |
| GPS type | Dual-band GNSS |
| Operating system | Xiaomi HyperOS 3 |
| Works with | iPhone and Android |
| Connection | None |
| Plan needed | None |
| Health sensors | SpO2, HRV, Skin temperature |
| Safety features | SOS, Fall detection |
Who it fits
- Works with iPhone and Android.
- Lists SOS or fall detection, see our guide for older adults.
- Lists an exact water rating of 5ATM or higher.
How it compares
Closest models from Xiaomi
| Model | Release year | Case size | Battery as listed | Water rating | GPS type | Works with |
|---|---|---|---|---|---|---|
| Xiaomi Watch S1 | 2022 | 46 mm | Up to 12 days | 5ATM | Dual-band GNSS | iOS and Android |
| Xiaomi Watch S1 Active | 2022 | 46.5 mm | Up to 12 days | 5ATM | Dual-band GNSS | iOS and Android |
| Xiaomi Watch S4 | 2025 | 47 mm | Up to 15 days | 5ATM | 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 |
|---|---|---|---|---|---|---|
| Huawei Watch Fit 4 Pro | 2025 | 44.6 mm | Up to 10 days | 5ATM | Dual-band GNSS + maps | iOS and Android |
| OnePlus Watch Lite | 2025 | 45 mm | Up to 10 days | 5ATM (approx.) | Dual-band GNSS | iOS and Android |
| Amazfit Bip 6 | 2025 | 46.3 mm | Up to 14 days | 5ATM | Dual-band GNSS | iOS and Android |
Compared with Xiaomi Watch S1, Xiaomi Watch S4 41mm lists a smaller case (41 mm against 46 mm) and a newer release year (2025 against 2022).
Compared with Xiaomi Watch S1 Active, Xiaomi Watch S4 41mm lists a smaller case (41 mm against 46.5 mm), a newer release year (2025 against 2022) and Stainless steel case material, where Xiaomi Watch S1 Active lists Reinforced polymer.
Compared with Xiaomi Watch S4, Xiaomi Watch S4 41mm lists a smaller case (41 mm against 47 mm) and Stainless steel case material, where Xiaomi Watch S4 lists Aluminum.
Compared with Huawei Watch Fit 4 Pro, Xiaomi Watch S4 41mm lists a smaller case (41 mm against 44.6 mm) and Stainless steel case material, where Huawei Watch Fit 4 Pro lists Titanium/aluminum.
Compared with OnePlus Watch Lite, Xiaomi Watch S4 41mm lists a smaller case (41 mm against 45 mm) and Stainless steel case material, where OnePlus Watch Lite lists Polished stainless steel.
Compared with Amazfit Bip 6, Xiaomi Watch S4 41mm lists a smaller case (41 mm against 46.3 mm), a dimmer listed display (1500 nits against 2000) and Stainless steel case material, where Amazfit Bip 6 lists Aluminum.
Only values listed exactly are compared.
Position in the catalog
Its case size of 41 mm is larger than 6% of 52 smartwatches with a single exact size. Its exact water rating of 5ATM is above 4% of 78 smartwatches with a single exact ATM rating. It was released in 2025. Among 128 smartwatches with an exact release year, 91% were released in 2025 or earlier and 27% were released in 2025 or later.
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
- Xiaomi smartwatches
- All models
Last verified September 26, 2026
Features change with updates. Check the maker's current details. See our methodology