This is a relatively new app, only 500+ downloads when I write this. Has several sounds, I'm more interested in the brown noise as I've got builders working next door. Only tried for one night but seems to be working. Mine runs until I wake and turn it off, no interruptions. There are ads and I can't see a way to remove them, but as they're only at the bottom of the screen and don't interfere with the sounds, just ignore them. Will update after another week.