Apple Watch Ultra 3: specs, who it fits and compatible phones
Apple Watch Ultra 3 is a sport watch released in 2025 that works with iPhone. It lists Dual-band GNSS + maps, 10ATM and Apple Pay.
Specifications
| Release year | 2025 |
|---|---|
| Case size | 49 mm |
| Display | OLED, Always-On |
| Brightness | 3000 nits |
| Battery as listed | Up to 42 hours · 72 hours saver |
| Water rating | 10ATM |
| Glass | Sapphire |
| Case material | Titanium (natural/black) |
| GPS type | Dual-band GNSS + maps |
| Offline maps | Yes |
| Operating system | Not listed |
| 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.
Position in the catalog
Its case size of 49 mm is larger than 67% of 36 sport watches with a single exact size. Its exact water rating of 10ATM is above 38% of 55 sport watches with a single exact ATM rating. It was released in 2025. Among 60 sport watches with an exact release year, 60% were released in 2025 or earlier and 73% were released in 2025 or later.
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.
Also available: Apple Watch Ultra 4, which differs in a newer release year (2026 against 2025).
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