This is an application launcher.To display an overlay icon on the screen.When you tap or long tap the icon to open the launcher.The icon can be displayed in the lower left, lower right, upper left, upper right.The launcher, you can register an application, ,you can register a shortcut.The paid version URLhttps://play.google.com/store/apps/details?id=net.webmise.overlaylauncher_exhttp://goo.gl/lC7Vg