5 stars: It does what it's supposed to do. If it can't find a way to bring your music to a (somewhat) gradual fade so that you aren't woken up by it suddenly stopping, then it will turn down the volume on your phone down to a mute as an alternative action. Works across different phones and music apps. Never had a problem after using it for several years
4 stars: Occasionally glitchy (fixes itself after a quick restart), I have woken up maybe twice since downloading to music still playing, and the time-setting mechanism is awkward. But overall a good app considering it's free. Easy to use and I like the clarity of the app's layout.
4 stars: So far so good. Does exactly what it supposed to do which is a rare commodity nowadays. If there is one option that the app does not have is an option to turn off the
3 stars: This used to be perfect. Not sure what changed in the last few months, but as others have reported, it looks like it is counting down, but doesn't finish. Another symptom is that it will seem like it has stopped the app from playing, but I wake up in the morning and the player is still counting down and the app is playing.
3 stars: Nice app, needs some way to disable the 1 min alert, just as you fall asleep you get this really loud alert that wakes you up again! Also if left running in the background will randomly start youtube playing after a few hours, has happened multiple times now. Shake to add time doesn't seem to work either.
2 stars: Sleep...