OnePlus Watch 4: specs, who it fits and compatible phones
OnePlus Watch 4 is a smartwatch released in 2026 that works with Android. It lists Dual-band GNSS, 5ATM · IP68 and Google Wallet.
Specifications
| Release year | 2026 |
|---|---|
| Case size | 46 mm |
| Display | AMOLED |
| Brightness | 3000 nits |
| Battery as listed | Up to 5 days · up to 16 days in power saver mode |
| Water rating | 5ATM · IP68 |
| Glass | Sapphire |
| Case material | Full titanium |
| GPS type | Dual-band GNSS |
| Operating system | Wear OS 6 + OxygenOS Watch 8 |
| Works with | Android |
| Connection | None |
| Contactless wallet | Google Wallet |
| Plan needed | None |
| Health sensors | SpO2, HRV, Skin temperature, ECG, Sleep apnea |
| Safety features | SOS, Fall detection |
Who it fits
- Works with 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 OnePlus
| Model | Release year | Case size | Battery as listed | Water rating | GPS type | Works with |
|---|---|---|---|---|---|---|
| OnePlus Watch 3 | 2025 | 47 mm | Up to 5 days · up to 16 days in power saver mode | 5ATM · IP68 | Dual-band GNSS | Android only |
| OnePlus Watch 2 | 2024 | 46 mm | 100 hours smart · 12 days saver (500mAh) (approx.) | 5ATM · IP68 | Dual-band GNSS + maps | Android only |
| OnePlus Watch 2R | 2024 | 46 mm | 100 hours smart · 12 days saver (500mAh) (approx.) | 5ATM · IP68 | Dual-band GNSS + maps | Android only |
Closest models from other brands
| Model | Release year | Case size | Battery as listed | Water rating | GPS type | Works with |
|---|---|---|---|---|---|---|
| OPPO Watch X3 | 2026 | 47.4 mm | Up to 5 days · up to 16 days in power saver mode | 5ATM · IP68 · IP69 | Dual-band GNSS + maps | Android only |
| TicWatch Atlas | 2024 | 52.8 mm | Up to 90 hours (saver display) | 5ATM | Dual-band GNSS | Android only |
| Galaxy Watch 9 | 2026 | 40 / 44 mm | Up to 30 hours (AOD) | 5ATM · IP68 | Dual-band GNSS | Android only |
Compared with OnePlus Watch 3, OnePlus Watch 4 lists a newer release year (2026 against 2025), a brighter listed display (3000 nits against 2200) and Full titanium case material, where OnePlus Watch 3 lists Stainless steel + titanium bezel.
Compared with OnePlus Watch 2, OnePlus Watch 4 lists a newer release year (2026 against 2024), a brighter listed display (3000 nits against 1000) and Full titanium case material, where OnePlus Watch 2 lists Stainless steel.
Compared with OnePlus Watch 2R, OnePlus Watch 4 lists a newer release year (2026 against 2024), a brighter listed display (3000 nits against 1000) and Full titanium case material, where OnePlus Watch 2R lists Aluminum.
Compared with OPPO Watch X3, OnePlus Watch 4 lists Full titanium case material, where OPPO Watch X3 lists Titanium.
Compared with TicWatch Atlas, OnePlus Watch 4 lists a smaller case (46 mm against 52.8 mm), a newer release year (2026 against 2024) and Full titanium case material, where TicWatch Atlas lists Stainless steel.
Compared with Galaxy Watch 9, OnePlus Watch 4 lists Bluetooth only, while Galaxy Watch 9 lists eSIM or LTE and Full titanium case material, where Galaxy Watch 9 lists Aluminum.
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
- OnePlus smartwatches
- All models
Last verified September 26, 2026
Features change with updates. Check the maker's current details. See our methodology