For all you dives.
Today, the Oceanic+ app comes to Apple Watch Ultra, turning Apple’s most rugged watch into a fully capable, easy-to-use dive computer. Designed by Huish Outdoors in collaboration with Apple, Oceanic+ enables recreational scuba divers to take the watch they wear every day to previously unreachable depths — up to 40 meters, or 130 feet, to be exact — with the all-new depth gauge and water temperature sensors on Apple Watch Ultra.
The Oceanic+ app on Apple Watch Ultra and the companion app for iPhone provide all of the key features of an advanced dive computer, robust dive planning, and a comprehensive post-dive experience…
https://apps.apple.com/app/id1610517133?platform=appleWatch
Basic plan is free, and includes many common dive functions, including depth and time, as well as logging most recent dives.
Added features require a monthly subscription of $9,99, or annually for $79,99.