Abstract: Disclosed are a portable electronic device, such as a smartphone with a touchscreen, and a method for displaying a graphical user interface (GUI) thereon. The GUI has a first area enabling a device user to interact with a display application designed to be unstoppable by the user, and a second area enabling the user to interact with other applications. The device executes three applications: the display application, a service, and a plugin. The display application displays data in the first area of the GUI—these data may include advertisements. The service uninstalls interfering applications, such as advertisement blockers; updates the three applications when new versions issue; and ensures that the display application and the plugin are always executing. The plugin ensures that the display application and the service are always executing. The three applications may execute using elevated permissions, to prevent them from being stopped or disabled.