Questions
Does the timer keep running in another tab?
Yes. The time left is calculated from the end time, so it stays correct when you switch tabs. On a phone, keep the screen on so the browser does not pause the sound.
How do I stop the alarm sound?
Press Stop or the space bar. The timer then goes back to the time you set.
Can I count down to a specific date?
Choose Until a date, then enter an event name and a date and time. The days, hours, minutes and seconds left update every second and are saved in this browser.
How do I use it in full screen?
Press the full screen button on the timer or the F key. Press Esc to leave full screen.