What a 25 minute timer is for
Twenty-five minutes is one Pomodoro: a single block of focused work with no interruptions, followed by a five-minute break. It is the most widely used unit of deliberate concentration there is.
What people set it for
- One Pomodoro of uninterrupted focused work
- A revision block before a short break
- A writing sprint with the phone face down
- Any task you want to attack without checking messages
How this timer behaves
The countdown is stored as the moment it should finish, not as a number being decremented, so switching tabs or minimising the window cannot make it run late, and pausing and resuming is exact. Through the final minute the readout and its ring turn red and pulse, giving you a warning before the alert rather than only at it.
It does not start on its own. The alarm is generated in your browser, and browsers keep audio silent until you interact with the page — so a timer that started by itself would be a timer that finished in silence. One tap on start is what makes the sound work.