I really like this app for the sound it produces, its my favourite to fall asleep to.
However, I find the user experience to be a bit clunky. Its one easy click to mute it, but there is no way to pause the sound - you can only shut down the app, or keep it running on mute, which drains your battery. Similarly, if I pull the earphones out of my phone, the sound continues through my speakers, rather than pausing as other apps do. I also dislike that there isnt a simple way to have the sleep timer repeat once it has run out - you have to reopen the app, go into the time, and then set it again. I just want a 1-click repeat button.