Timer HUD is a simple hands-free timer designed for Meta Ray-Ban Display glasses. The app supports both countdown and count-up modes in a fixed 600 x 600 display layout. It is controlled entirely with directional swipes and Enter, so it works without touch, mouse, keyboard, or text input. Users can adjust the timer length, start, pause, reset, switch between countdown and count-up, and enter a fullscreen timer view. In fullscreen mode, the display is kept minimal and readable, with a swipe-left gesture returning to the setup screen. When a countdown reaches zero, the timer gives an audio alert and turns the time display red for clear visual feedback. Timer mode and duration are saved locally so the app can reopen with the previous settings.