This app implements a basic public-speaker countdown timer.
• Allows setting the duration of the countdown (and saves default between launches)
• Runs full-screen by default, but can be windowed and re-sizes to any window size
• Prominent, clean display of remaining time
• Turns orange with 1/4 time remaining and red with 1/8 remaining
• Easily shareable using Zoom screen share
• Keyboard shortcuts: Return or Space to start/stop; ESC or delete to reset
• No noises or audible alarms to annoy speakers as they wrap up