Techniques are disclosed for improving performance of a touchscreen device. In an aspect, the touchscreen device receives a selection of an application or function based on a user touching a portion of a touchscreen display of the touchscreen device that includes an icon representing the application or function, collects biometric data of the user based on the user touching the portion of the touchscreen display, and determines whether the user is authorized to access the application or function based on the biometric data. In an aspect, the touchscreen device detects that a portion of the touchscreen display is unresponsive to user touch input, and in response to the detection, moves at least one icon displayed on the unresponsive portion of the touchscreen display to a portion of the touchscreen display that is responsive to user touch input.