After Kobi made the first selection of rain sound and played it, the next time I went back to the app, the home menu of 3 types of rain sounds was gone. There was only a blank screen and a ‘Pause’ and ‘Play’ button. I hit ‘Play’ and the rain sound I’d previously selected played. I wasn’t able to go back to the menu to choose the type of rain sound again, even after exiting the app and opening it a few times.