Smartwatches · 2026 · Apple
Apple Watch Ultra 4
A large GPS and cellular sports watch for iPhone, with dual-frequency positioning, depth and water-temperature sensors. Health and satellite features depend on region, carrier and software.
A3579; 49 mm natural titanium; translucent gray Ocean Band
Specifications
| Specification | Value |
|---|---|
| Announcement / availability | 9 / 18 September 2026 |
| Case | Grade 5 titanium; sapphire front crystal |
| Size | 49 × 44 × 12 mm |
| Weight | Natural titanium case 63 g |
| Display | LTPO3 OLED; 422 × 514 |
| Brightness | 1 nit minimum; 3000 nits peak |
| Chip | S11; dual-core 64-bit |
| Storage | 64 GB |
| Health sensors | Electrical/optical heart; blood oxygen; temperature |
| Outdoor sensors | Depth, water temperature, compass, altimeter |
| Positioning | Precision dual-frequency GNSS |
| Wireless | Wi-Fi 4, 2.4/5 GHz; Bluetooth 5.3; UWB |
| Cellular | A3579: 5G RedCap and LTE |
| Manufacturer battery test | Up to 50 hours normal use; 84 in Low Power Mode |
| Charging | About 45 minutes to 80% |
| Water / dust | 100 m rating; IP6X |
| Diving limit | Recreational diving to 40 m |
| Phone compatibility | iPhone 11 / SE 2 or later; iOS 27+ |
From the manufacturer
Apple emphasises its revised health sensors and endurance during long workouts. Apple unveils Apple Watch Ultra 4
Strengths and limitations
Nandagopal Rajan gets two days with cellular use; the readiness score had not appeared during his test.
The Indian Express: Apple Watch Ultra 4 review
Owner experiences and issues
azhava likes endurance with GPS, cellular music and sleep tracking; jz0309 also reports positive early results.
MacRumors: Ultra 4 battery experiencesLawren757 likes endurance and health data but is waiting for software to enable some features.
Best Buy: black Ultra 4 Milanese Loop owner reviewTwo of the three Best Buy reviews find the battery life excellent; a buyer coming from a Series 2 likes health features such as HRV and the recovery score. BBcustomer says the large case is hard to fit under long-sleeved shirts, and two reviewers are waiting for a watchOS update for some features. KCFT is disappointed that their older Ultra does not get watchOS 27.
Best Buy: black Ultra 4 Milanese Loop owner review
Tags
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