When the Apple Watch Ultra was announced in September, Apple spent a big portion of its slick introduction video focusing on its ability to be a dive buddy: part dive computer, part dive planner, this Apple Watch could survive depths far greater than the standard model and could make life a lot simpler for scuba divers. There was only one catch: all those features would come with the introduction of a new app from a third-party development partner later in the year. .

The dive planner lets users set their surface time, their depth, and their gas, and Oceanic+ will calculate their No Deco (no-decompression) time.
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