Very good

You can mix as much as you want & as your convenience.
The fact that it can work if you leave the app & do something else with your phone, is very useful.

Its also very pleasant to use. Nice interface & fonts.
Would be just a bit better if we could choose also the background colour.

Theres some little bugs in the labels of the sounds we save but, it works perfectly.

MacAddict73 about Deep Relax Sleep Music, v1.4