Oceanic+ Dive Housing allows you to take great photos with automatic color-correction on your iPhone when diving or during any water adventure. With the Oceanic+ app and Dive Housing, your iPhone also becomes a fully-functional dive computer. One app, one subscription, two devices! With the Oceanic+ app, you can use the same subscription for both the Apple Watch Ultra and iPhone. This allows you to have two units sharing the same subscription to save you money. It also provides greater redundancy for diving with both the Apple Watch Ultra and iPhone with Oceanic+ Dive Housing. At the end of each dive, the primary computer will be selected for your dive data.