Beyond the Marketing
Apple rates the Ultra 3 for recreational diving to 40 meters. We took it on 15 real dives—reef, wreck, and night—to see how the dive computer features hold up against dedicated units.
Dive Computer Features
The Oceanic+ app provides depth, time, temperature, no-decompression limits, and ascent rate alerts. GPS marks entry/exit points on the surface. Post-dive logs sync to iPhone automatically.
Reef Dive (18m, 45min)
Depth readings matched our Suunto reference within 0.3m. No-decompression timer was accurate. The always-on display remained readable in bright tropical sunlight at depth.
Wreck Dive (32m, 25min)
At depth, the watch maintained accuracy. NDL calculations aligned with our backup computer. Haptic alerts for ascent rate were noticeable even through a 5mm wetsuit.
Night Dive (12m, 40min)
The 3000-nit display was almost too bright in complete darkness. Dimming options help. The compass bezel proved useful for underwater navigation in zero visibility.
Limitations
No air integration (yet). No multi-gas switching for technical diving. Decompression algorithm uses Buhlmann ZHL-16C, which is conservative compared to some dive computers.
Verdict
For recreational divers, the Ultra 3 replaces a dedicated dive computer. Technical divers still need specialized gear. For everyone else, it is the most versatile dive-capable wearable available.
