Life changes a lot according to the quality of sleep. This App was made for people who pursue the quality of sleep. Feature-A red filter is covered over the screen of your smart phone as a bedtime hour is approached. (Since a pale light of the screen of a smart phone is close to the light of the sun of daytime, it is said that it will mistake if a brain is daytime, and a rhythm in the living body is out of order. )-While you are sleeping, your smart phone is made into airplain mode. (It is said that the electric wave which a smart phone emits checks sleep. By setting it in mode inside the plane, waking by mail arrival and consumption of a battery can also be prevented at the time of sleeping. )-The inside of a bedtime hour covers a dark filter over the screen of your smart phone.(When you awake midnight and a smart phone is taken in its hand, it prevents stopping the brightness of a screen and being wide-awake. )-While you are sleeping, your smart phone is made into silent mode.