Smartwatches / Apple
Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium)
Satellite SOS, 42-hour battery and a depth gauge — Apple's only watch that lasts a weekend.
Overall score 8/10
Pros
- + Best battery of any Apple Watch by a wide margin — 42 h claimed, 72 h in Low Power
- + Satellite messaging works with no phone and no cell signal, which nothing else here offers
- + Titanium and sapphire, 100 m rating and a real depth gauge for the price of a Galaxy Watch Ultra2
- + Cellular is included rather than being a $100 upcharge and a second ASIN
Cons
- − $799 and iPhone-only — the most money you can spend on a watch that one phone switch renders useless
- − 49mm and titanium make it genuinely large and heavy on small wrists
- − Even 42 hours is beaten by a $79 Amazfit and a $250 OnePlus
- − Satellite features are region-limited and depend on being outdoors with a clear sky
Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) review: what the specs say
Satellite SOS, 42-hour battery and a depth gauge — Apple's only watch that lasts a weekend. At $799, Apple's 2025 model sits at the premium end of the category — the smartwatches we compare run from $79.99 to $799. It scores 8.0/10 overall, calculated from published specifications across 8 categories rather than from a subjective impression.
Its strongest showing is App Ecosystem at 10.0/10 — whether there is a real third-party app store on the wrist or a handful of proprietary mini-apps. The weakest is Ecosystem Freedom at 1.0/10, which is the trade-off to weigh before buying: if that is the specification you care about most, one of the alternatives below will serve you better.
Worth knowing before you buy: $799 and iPhone-only — the most money you can spend on a watch that one phone switch renders useless; and 49mm and titanium make it genuinely large and heavy on small wrists. Every specification on this page comes from Apple's own documentation or a verified retail listing — where a figure is not published, the table says so rather than estimating it.
Specifications and price last verified . Report an error
Full Specifications
| Phone Compatibility | iPhone only. Requires iPhone 11 or later on iOS 26. Satellite features additionally require the watch to be out of cellular range, and are US/Canada-region dependent. |
| Claimed Battery Life | 42 hrs |
| What the Battery Claim Assumes | Apple's 42 h figure assumes the always-on display active and a mixed-use day with one workout; 72 h is Low Power Mode with the always-on display disabled and some sensors throttled. Multi-hour GPS workouts and satellite use pull it down sharply. |
| Case Size | 49 mm |
| Display | LTPO3 wide-angle OLED, always-on, up to 3000 nits |
| Operating System | watchOS 26 |
| Third-Party Apps | Full on-device App Store — the same native watchOS catalogue as Series 11, plus dive and outdoor apps that use the depth sensor |
| Health Features Enabled in the US | Live in the US: ECG, irregular rhythm notifications, sleep apnea notifications and hypertension notifications (all FDA-cleared), plus wrist temperature and a depth gauge. Blood Oxygen is the post-Masimo redesign — sampled on the watch, computed on the iPhone. |
| Subscription Wall | None required. Satellite features are included with the hardware, not sold as a subscription. |
| LTE Option | Not an option — 5G cellular is included in every Ultra 3 and is part of the $799 price. A carrier line is still required and billed separately. |
| Water & Dust Rating | 100 m water resistant (WR100), IP6X dust, EN13319 dive certified to 40 m |
| Battery Replacement | Apple out-of-warranty battery service is a flat $99, the same as the aluminium models. |
| Connectivity | Bluetooth, Wi-Fi, NFC, 5G cellular (included), Satellite messaging and Emergency SOS |
| Material | Aerospace-grade titanium case with flat sapphire crystal front |
| Warranty | 12 months |
Compare Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) With
Cheaper Alternative
Samsung Galaxy Watch Ultra2 (47mm, LTE, Titanium) — $699.99