How the pomodoro technique works
The pomodoro technique was devised by Francesco Cirillo in the late 1980s and named after the tomato-shaped kitchen timer he used as a student (pomodoro is Italian for tomato). The method is deliberately simple. Pick one task, set a timer for 25 minutes and work on nothing else until it rings. Take a 5 minute break, away from the screen if you can. After four focus sessions, take a longer break of 15 to 30 minutes. Each completed focus session is one "pomodoro", which is what the dots under the timer count.
The breaks are the load-bearing part, not an indulgence. Sustained attention degrades quietly, and a forced pause every half hour keeps the later sessions nearly as sharp as the first. The other quietly clever bit is the contract with yourself: for 25 minutes, incoming messages and stray thoughts get written down and dealt with later, not now.
Using this timer
Choose a preset (Focus 25, a 5 minute short break or a 15 minute long break) or pick Custom for anything from 1 to 180 minutes. Start, Pause and Reset do exactly what they say, and every completed focus session fills a dot in your current set of four. The end beep is off by default so the timer never makes a sound you did not ask for; tick the box to enable it before you press Start.
Two details are worth knowing. The countdown is mirrored in the browser tab title, so you can keep an eye on it while working in another tab. And the timer calculates the finishing moment from your device clock rather than counting ticks, so it stays accurate even though browsers deliberately slow background tabs down. Everything runs in your browser; nothing you do here is stored or uploaded.
What it is genuinely good for
The technique shines on work you are avoiding. "Write the report" is daunting; "work on the report for 25 minutes" is not, and starting is usually the whole battle. It also gives you an honest unit of measurement. Days feel busy regardless of what got done, but pomodoros do not lie: if the afternoon produced one, you know where the time went. Counting sessions for a week is a mildly uncomfortable and very useful exercise.
Where it falls short, honestly
The 25 minute block is arbitrary, and for some work it is actively wrong. If you reach deep concentration at minute 20, the bell at minute 25 interrupts exactly the state you were trying to build; programmers and writers often do better with 50 or 90 minute sessions. The technique also assumes you control your time. In interrupt-driven jobs, on support rotas or in meeting-heavy roles, the timer loses to the calendar every time.
Be realistic about the evidence, too. The pomodoro technique is a sensible packaging of things that are well supported (single-tasking, regular rest, small starts), but there is little direct research showing this specific ritual beats simply taking sensible breaks. And no timer fixes the harder problem of choosing the right task in the first place; 25 minutes of polished focus on the wrong thing is still the wrong thing. Treat it as a tool: keep what works, change the numbers freely and drop it without guilt on the days it does not fit.
Frequently asked questions
Why is a pomodoro 25 minutes?
There is nothing magical about the number. Francesco Cirillo, who invented the technique, simply used the tomato-shaped kitchen timer he had to hand. It has stuck because 25 minutes is short enough that starting feels easy and long enough to get something real done. Use the Custom option if another length suits you better.
Does the timer stay accurate in a background tab?
Yes. It stores the exact finishing moment as a clock timestamp and works the remaining time out from that, rather than counting ticks. Browsers slow timers down in background tabs, but that only affects how often the display refreshes, never the moment the timer actually ends.
Why did I not hear a beep?
The beep is off by default so the timer never surprises you. Tick the box to enable it, and do so before you press Start, because browsers only allow sound after you have interacted with the page. The countdown is also mirrored in the tab title, so you can spot the time remaining from another tab.
What do the dots mean?
Each filled dot is a completed focus session in your current set of four. The classic pattern is a short break after each session and a longer break after every fourth, at which point the set starts again. Breaks do not fill dots, only focus sessions do.
Can I run a session longer than 25 minutes?
Yes. Choose Custom and enter anything from 1 to 180 minutes. Plenty of people prefer 50 minute sessions with 10 minute breaks, which fit neatly into meeting-heavy calendars. The technique is a tool, not a rulebook.