It’s the "Live Wallpaper" which you can get the effect of ripple for your current wall paper.Every time you touch the screen, you get an effect of the ripple in the surface of the water which extends to the screen.1.Please set the wallpaper before run this application.2.Any wallpaper should be OK, but the image of the wallpaper will be only one screen.(The capture position of the wallpaper can be changeable for the paid version.)3.There is a limitation in this application setting for the program in the free version.if you feeling slow this effect, Please use "Reflection wallpaper" option in settings.*1. "Reflection wallpaper" has been set to "ON" by default setting from ver1.1.5.Please change the setting to "OFF" If you would like to apply the effect on full screen.