ZonkOut sleep timer是一款适合在睡前收听的iPhone应用，其特点是可以设置音乐渐弱，并且可以设置渐弱的时间。
Put yourself to sleep with ZonkOut – the best sleep timer for iOS!
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Simply choose the music or any other iPod audio you want to listen to, rotate the timer to the desired amount of time and enjoy.
ZonkOut gradually reduces the playback volume in time, so you fall asleep with music fading out. To modify the time percentage when the music is played at initial volume, simply slide the slider in the direction you want. Sliding the fade slider to the left means ZonkOut will start to attenuate music earlier than if you slide the fade slider further to the right.
★ extremely easy to use
★ gorgeous design
★ iPod integration
★ in-app music selection
★ current song display
★ volume fading
★ hi-resolution graphics
NOTE: ZonkOut must be left opened as the active application, i.e. it does not work in background.