Quickly And Better sleeping. - Sleeping:https://itunes.apple.com/us/app/id548576505?mt=8 Sleeping Free:https://itunes.apple.com/us/app/id555302295?mt=8 - Features: √ Professional music √ Day and Light Mode, adapt to different light and hobbies √ Timed playback and set free clock time √ Custom list of songs , pick and choose to select the music that best suits your sleep √ Background playback -