A method is disclosed for quitting an application on a device with a touchscreen such as a mobile phone. The method uses a finger gesture that works on the mobile operating system level to close applications running on the device. The system requires the user to draw the alphabet “X” using his/her finger on the screen, which closes the application running on the device. The method provides a quick, efficient and universal gesture to quit an application at the operating system level that functions across all the applications running.
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Bailiang, Zhou, "Finger Gesture to Quit an Application on Mobile Devices", Technical Disclosure Commons, (November 30, 2015)