Xiaomi Redmi Watch 4: specs, who it fits and compatible phones
Redmi Watch 4 is a smartwatch released in 2024 that works with iPhone and Android. It lists Standard GPS, 5ATM and SpO2, Heart rate.
Specifications
| Release year | 2024 |
|---|---|
| Case size | Not listed |
| Display | AMOLED |
| Brightness | 600 nits (approx.) |
| Battery as listed | Up to 18 days |
| Water rating | 5ATM |
| Case material | Aluminum |
| GPS type | Standard GPS |
| Operating system | HyperOS (RTOS) |
| Works with | iPhone and Android |
| Connection | None |
| Plan needed | None |
| Health sensors | SpO2, Heart rate |
Who it fits
- Works with iPhone and Android.
- Lists a battery above the median of 89 listed smartwatch models.
- 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 |
|---|---|---|---|---|---|---|
| Redmi Watch 5 Lite | 2024 | - | Up to 18 days | 5ATM | Standard GPS | iOS and Android |
| Xiaomi Smart Band 9 Pro | 2024 | - | Up to 21 days | 5ATM | Standard GPS | iOS and Android |
| Redmi Watch 5 | 2024 | - | Up to 24 days | 5ATM | Standard GPS | iOS and Android |
Closest models from other brands
| Model | Release year | Case size | Battery as listed | Water rating | GPS type | Works with |
|---|---|---|---|---|---|---|
| Amazfit Active Edge | 2024 | 46.6 mm | Up to 16 days | 10ATM | Standard GPS | iOS and Android |
| CMF Watch Pro 2 | 2024 | 45.5 mm | Up to 11 days | IP68 | Standard GPS | iOS and Android |
| Garmin Lily 2 Active | 2024 | - | Up to 9 days | 5ATM | Standard GPS | iOS and Android |
Compared with Redmi Watch 5 Lite, Redmi Watch 4 lists Aluminum case material, where Redmi Watch 5 Lite lists Polymer.
Compared with Xiaomi Smart Band 9 Pro, Redmi Watch 4 lists a shorter listed battery (18 days against 21).
Compared with Redmi Watch 5, Redmi Watch 4 lists a shorter listed battery (18 days against 24).
Compared with Amazfit Active Edge, Redmi Watch 4 lists a longer listed battery (18 days against 16), a lower ATM rating (5 against 10) and Aluminum case material, where Amazfit Active Edge lists Translucent polymer.
Compared with CMF Watch Pro 2, Redmi Watch 4 lists a longer listed battery (18 days against 11).
Compared with Garmin Lily 2 Active, Redmi Watch 4 lists a longer listed battery (18 days against 9) and Aluminum case material, where Garmin Lily 2 Active lists Anodized aluminum.
Only values listed exactly are compared.
Position in the catalog
Its listed battery of 18 days is above 78% of 46 smartwatches with a single plain days value. Its exact water rating of 5ATM is above 4% of 78 smartwatches with a single exact ATM rating. It was released in 2024. Among 128 smartwatches with an exact release year, 73% were released in 2024 or earlier and 59% were released in 2024 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