Your brain will remember the color of the background of your smartphone after having checked it.
Because the tint of the background color corresponds to a time, you are able to tell time without having to look at the clock.

You have to take some time to learn the main colours:
* 00 min is red
* 07 min is yellow
* 15 min is green
* 30 min is turquoise
* 40 min is dark blue
* 50 min is purple
* 59 min is red

此版本中的新功能：