A little limited

It would be useful if the app could continue playing sounds when other apps are in use, rather than it alone. For instance, if you are getting in your sleep mood and still need to respond to text messages or emails, want to set your alarm, etc. you should still be able to hear your sleep sounds

I also expected greater variety in sounds, but these are not bad. A little more research in that area might help?

Still helpful though!! :)

gvukojev about Sleep Sounds, v3.3