Keeping meetings short
The Scrum framework limits its Daily Scrum to 15 minutes, and many teams borrow that time box for any daily check-in. Share your screen with the timer in full screen, or put it on a meeting-room display, so everyone can see the time left. When the alarm sounds, park the remaining topics for a follow-up rather than pressing +1 min again and again.
Homework and study blocks
A 15 minute timer gives a manageable block for younger students, or for a subject you find hard: one set of exercises, one page of notes, one round of flash cards. After the alarm, take a short break, then start another block. Three blocks, each followed by a 5-minute break, fill exactly one hour: 3 × (15 + 5) = 60 minutes.
The long Pomodoro break
The Pomodoro Technique alternates 25 minutes of work with short breaks and, after four rounds, a longer break of about 15 to 30 minutes. Use this page for the long break and the 25 minute timer for the focus sessions.
A quarter of an hour, everywhere
Fifteen minutes is also a common unit on time sheets: some employers round clock-in and clock-out times to the nearest quarter hour, which is 0.25 h in decimal. In the kitchen, many rice and vegetable dishes simmer for around 15 minutes; check your recipe or the packet.
How the timer works
Press Start, Pause or Reset at any time; +1 min adds a minute without restarting. The alarm can be muted, and phones that support it vibrate too. The timer stays exact in background tabs, keeps the screen on while it runs where supported, and works offline once loaded. For half an hour, use the 30 minute timer; for any other length, the main online timer.