Most casual users won't get to see how the Depth app responds during the more committed activity of open water free-diving because Apple Watch Ultra comes with a stock Depth app.
DC Rainmaker has posted a video on his website in which he demonstrates the Depth app in action using an underwater test chamber.
The Depth app fluidly responds to greater water pressure as a diver descends, showing the Meters and Feet readouts accurately adjust on the display as the background water animation fluctuates in kind.
The Depth app is designed for underwater activities at a maximum depth of 40 meters, but Apple Watch Ultra has a water-resistance rating of 100 meters, which makes it capable of withstanding greater depth pressures than the Depth app is designed for.
DC's test shows what happens when a diver descends below 130 feet, with the screen turning bright yellow and no longer providing a depth reading.
The Dive app's consolidated dive summary at the end of a dive session is shown in the test. It can be found in the health app.
The Depth app is not a dive computer according to Apple. Apple suggests using a secondary depth gauge and timer if the Apple Watch Ultra fails.
Apple and Huish Outdoors have formed a partnership to create a dive computer for Apple Watch Ultra models. Oceanic+ will be a free app on the App Store and will include a lot of features.
Users will need to purchase a subscription plan for more advanced diving options. The app will be on the App Store later this year.
I would like to thank Sonny!