Apple Watch Ultra 4: specs, who it fits and compatible phones
Product image unavailableApple Watch Ultra 4
Apple Watch Ultra 4 is a sport watch released in 2026 that works with iPhone. It lists Dual-band GNSS + maps, 10ATM and Apple Pay.
Specifications
| Release year | 2026 |
|---|---|
| Case size | 49 mm (approx.) |
| Display | OLED, Always-On |
| Brightness | 3000 nits (approx.) |
| Battery as listed | Up to 50 hours · 84 hours saver |
| Water rating | 10ATM |
| Glass | Sapphire |
| Case material | Titanium (natural/black) |
| GPS type | Dual-band GNSS + maps |
| Offline maps | Yes |
| Operating system | watchOS 27 |
| Works with | iPhone |
| Connection | eSIM · 5G |
| Contactless wallet | Apple Pay |
| Plan needed | None |
| Health sensors | SpO2, HRV, Skin temperature, ECG, Readiness score, Sleep apnea |
| Safety features | SOS, Fall detection |
Who it fits
- Works with iPhone.
- Lists dual-band GPS and offline maps, which suits running and hiking.
- Lists SOS or fall detection, see our guide for older adults.
Phone compatibility and plan
No plan is listed as needed. Has eSIM or LTE, so it can work without the phone if you add a carrier plan.
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
- Apple smartwatches
- All models
Last verified September 26, 2026
Features change with updates. Check the maker's current details. See our methodology