Whenever I would wake up for my classes, I would still feel groggy or unrested, no matter how many hours of sleep I got. Then I got this app, which wakes you up at the lightest point in your sleep cycle, which vastly improved how I felt in the mornings. It has lots of good features, and is very customizable. Its definitely one of the best sleep apps out there.
Kimberlyannepossible about Sleep Meister Lite, v1.13.23