• 

  An Apple Watch showing dive metrics. [credit: Apple ]

In September, Apple announced a new wearable called the Apple Watch Ultra , and one of the company's key pitches for the device was its use as a diving computer. Now Oceanic+, the app that makes that feature possible, launched exclusively for the Ultra, Apple announced today.

The Watch Ultra has depth gauge and water temperature sensors that drive some of the features in the app. To access a few of those features—such as decompression tracking—you'll have to subscribe to the app's premium version for $4.99 per day, $9.99 per month, or $79.99 per year. There's also a family plan at $129.99 annually. If you don't subscribe, you can still use some key features like dive logs, depth tracking, and so on.

The app—which was developed in partnership with Apple by a company called Huish Outdoors, lets you track dive conditions like tides, water temperature, and more. Here's a quick summary from Apple's blog post announcement :