How to use the Depth app on the Apple Watch Ultra

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Apple Watch Ultra comes with an exclusive Depth app for underwater recreational activities such as snorkeling. Here’s how to use it.

Apple’s support page warns that the Depth app is not a dive computer. It does not provide decompression stop information, gas analysis, or other data that divers need.

However, the Apple Watch Ultra and its depth sensor can work with third-party apps that do function as dive computers for recreational diving. It is compliant with EN13319, which is the internationally recognized standard for dive computers and meters.

The Depth app shows the current time, current depth, maximum session depth reached and water temperature. The Apple Watch Ultra’s depth sensor is accurate to plus or minus 1 meter.

It operates at a maximum depth of 130 feet or 40 meters. The Apple Watch Ultra screen will turn yellow below this depth and some features may be broken or stop working.

Using the Depth app

The Depth app can automatically open when it detects that the Apple Watch Ultra has been submerged at a depth of one meter or more. Users can also manually start a dive session by opening the app or pressing the action button.

To configure automatic opening of the Depth app:

  1. Open up Settings on the Apple Watch Ultra.
  2. Touch Generalthen tap Automatic launch.
  3. There is a switch called Auto launch app which users can turn on and off.
Configure autostart

Configure autostart

To change the Depth app’s units of measurement:

  1. Open up Settings on the Apple Watch Ultra.
  2. Touch Depth.
  3. Choose between Legs or Metersas well as Fahrenheit or Celsius.

Before and after diving

Users who want to record a workout during their session, such as open water swimming, should open the Workout app and start the exercise before submerging the Apple Watch Ultra.

Change units of measurement

Change units of measurement

Once the Depth app is opened, either automatically or manually, Water Lock will turn on for the Apple Watch Ultra to prevent accidental input on the screen or with the Digital Crown.

Press and hold the Digital Crown to turn off Water Lock and end the dive session. The screen will unlock and the watch will make certain sounds to clear the water from the speaker.

After the dive, the Depth app will display a summary of the dive to show the time spent underwater, the maximum depth reached, and the water temperature range experienced during the session.

Once the summary is dismissed, users can find water temperature and depth data in the Health app.