Sleep Cycle - Bio-alarm clock that wakes you up at optimal times based on your sleep patterns.
Sleep Calculator - Want to wake up in a good shape?
Sleep as Android - Common alarm clocks ignore your sleep cycles, they wake you on schedule no matter your are currently in your deep sleep. Waking up from deep sleep is unpleasant, it makes you tired and it may negatively affect your productivity during the whole day.
Alarm Klock - A better alarm clock.
Pillow for iOS - An iOS companion that helps you sleep better 💤
Wake Up Time - Fall asleep and actually wake up refreshed