Sleep as Android Full v20160402 build 1276
Requirements: Varies with device
Overview: Track your sleep and wake up gently with nature sounds in optimal sleep phase
Alarm clock with sleep cycle tracker. 

Smart alarm clock with sleep cycle tracking. Wakes you gently in optimal moment ...
Download: http://apkfox.com/sleep-as-android-full-v20160402-build-1276-android-apk-download/