Wakes you gently in light sleep for pleasant mornings

Sleep as Android

Alarm clock with sleep cycle tracker. Wakes you gently in light sleep for pleasant mornings. Features: sleep graph history, sleep deficit and deep sleep statistics, sharing (FaceBook, Twitter), nature alarms (birds, sea, storm...) with gradual volume up, alarm playlists from your music, lullabies for pleasant asleep, CAPTCHA to wake up on time, sleep talk or snoring recording and more... (2 weeks trial)
aka "Sleep as an Droid"

More info
https://sites.google.com/site/sleepasandroid/
FAQ (answer questions related to permissions, battery life, how it works...)
https://sites.google.com/site/sleepasandroid/q-a-faq