Thunderstorm, jetski, hoover… choose from these and many other sounds in the Sounds library. You can have them playing in the background while you listen to your Oto sessions.

You can use other apps while the sound plays, too, and even close Oto - the sound will keep playing.

To turn it off, just open up the Oto app and tap the pause button, next to the sound. You can adjust the volume here, too, so that it’s just right: