Thumsta is an ergonomic one-handed keypad application, designed specifically for the way use your mobile device. In portrait mode, choose between left and right handed operation, allowing you to keep one hand free for…whatever else you are doing. In Landscape, the keyboard splits into two arcs for faster two-thumbed operation.Installation Instructions:Tap Settings, scroll down to the Personal section, then tap Language & input. Just tap Default to swap keypads in Android. Scroll down again to the Keyboards & Input Methods heading for a list of all the keyboards installed on your Android device, with active keyboard checked on the left. These instructions vary depending on the device and the manufacturers software.