warpread

Pomodoro Timer

25 min focus · 5 min break · long break after 4

25:00Focus

Want the science behind this?

Five free lessons on attention research, ultradian rhythms, and how to structure Pomodoros with active recall and spaced repetition.

Free Pomodoro Course →Read the guide →

Tip: review flashcards during breaks for built-in spaced repetition

Frequently asked questions

How does the Pomodoro Technique work?

The Pomodoro Technique divides work into 25-minute focused intervals separated by 5-minute short breaks. After four intervals, you take a longer 15–30 minute break. Each interval should focus on a single, defined task without interruption. The technique is backed by research on the vigilance decrement — the measurable drop in attention that occurs after 20–25 minutes of sustained focus.

Can I change the timer duration?

Yes. Click "Customise intervals" to adjust focus duration (5–90 min), short break (1–30 min), and long break (5–60 min). The default 25/5/15 structure works for most people, but 50/10 works well for deep creative work and 15/3 helps when building attention capacity from scratch.

What should I do during Pomodoro breaks?

Short breaks should involve genuine cognitive rest — stand up, stretch, walk briefly, or look at something distant. Avoid screens and social media, which make it harder to re-engage. Use 3 minutes of each break for flashcard review to add built-in spaced repetition without extra study time.

How many Pomodoros should I do per day?

Most students can sustain 6–8 high-quality Pomodoros per day (2.5–3.5 hours of deep focus). Starting with 4 per day and building up gradually produces better long-term results than trying to do 10–12 from the start. Treat a consistent 4-Pomodoro day as more valuable than an inconsistent 8-Pomodoro one.

The timer is not the technique

Almost everyone who tries the Pomodoro Technique starts and stops at the timer: twenty-five minutes on, five off. That part is trivial and any clock will do it. The rules around the interval are what actually change how you work.

One task per interval, declared before you start. If you are interrupted, the interval is void — reset rather than resume. Thoughts that arrive mid-interval get written on a list and dealt with later, not chased. A task needing more than about five intervals gets broken down; several tasks needing less than one get grouped. Those constraints are what convert a timer into a commitment device.

Why the breaks are not optional

The break is the part people skip when work is going well, and skipping it is the most common way the method degrades into ordinary working-until-tired. Sustained attention declines measurably after roughly twenty to thirty minutes of continuous focus — the vigilance decrement — and the decline is not something you notice while it is happening.

A break only works if it is genuinely a break. Scrolling a feed keeps the same attentional systems loaded and produces very little recovery. Standing up, looking out of a window, walking to fill a glass of water: dull, and much more effective.

Adjusting it, and when it is the wrong tool

Twenty-five minutes is a starting point, not a finding. If you routinely hit flow and resent the bell, lengthen the interval to forty or fifty minutes with a proportionally longer break. If starting is the hard part, shorten it — a ten-minute interval you actually begin beats a twenty-five-minute one you negotiate with for an hour.

The technique manages time, not learning. It will not tell you whether re-reading or self-testing should fill the interval, and filling a Pomodoro with highlighting is a well-timed waste. Pair it with active recall for what goes inside, and if the difficulty is avoidance rather than focus, the procrastination course is the better starting point.

Choosing a Pomodoro timer or app

Searching for the best Pomodoro timer — or the best Pomodoro app, or a Pomodoro timer free of charge — turns up dozens of options, and the honest answer is that the differences between them barely matter. The technique is four rules and a clock. Any free Pomodoro timer that counts down twenty-five minutes and makes a noise at the end will do the job, and a kitchen timer genuinely works — Cirillo’s original was a tomato-shaped one.

What separates a Pomodoro app that gets used from one that gets deleted in a week is friction. A timer that needs an account, a download or a subscription adds a decision before every session, and the sessions you skip are the ones where starting was slightly annoying. That is the argument for a browser timer: this one opens in a tab, starts on one click, keeps your session count, and asks for nothing.

Two features are worth having and most free Pomodoro timers do include them: adjustable intervals, so you are not locked to 25/5 when your work suits 50/10, and an audible end-of-interval cue, so you are not watching the clock instead of working. Features beyond that — task lists, streaks, gamified forests, team leaderboards — are productivity software wearing a Pomodoro costume. They are not the technique and some of them actively compete with it for attention.

The one case for a dedicated desktop or phone app over a web timer is site blocking, which a web page cannot do for you. If your failure mode is opening a new tab rather than losing track of time, that is a different problem and a blocker is the right tool.

Common questions

How does the Pomodoro Technique work?
The Pomodoro Technique divides work into 25-minute focused intervals called Pomodoros, separated by 5-minute short breaks. After every four Pomodoros, you take a longer break of 15–30 minutes. Each interval should involve a single, defined task worked on without interruption. The technique was developed by Francesco Cirillo in the late 1980s and is supported by research on the vigilance decrement — the measurable decline in attention that occurs after 20–25 minutes of sustained focus on a single task.
Can I change the timer duration?
Yes. Click "Customise intervals" to adjust the focus duration (5–90 minutes), short break (1–30 minutes), and long break (5–60 minutes). The default 25/5/15 structure works for most people, but optimal intervals vary by person and task type. Many practitioners use 50/10 for deep creative work, or 15/3 when building sustained attention capacity.
What should I do during Pomodoro breaks?
Short breaks (5 minutes) should involve genuine cognitive rest — standing up, stretching, walking briefly, or looking at something distant. Avoid screens and social media, which stimulate the reward system and make it harder to re-engage with the task. Use 3 minutes of each break for flashcard review to add built-in spaced repetition without extra study time. Long breaks (15–30 minutes) should include physical movement and complete disengagement from work.
What is the best Pomodoro timer app?
For most people, whichever one they will actually open. The technique is four rules and a countdown, so a free Pomodoro timer in a browser tab does the same work as a paid app. Look for adjustable intervals and an audible cue at the end of each interval; treat task lists, streaks and gamification as optional extras that can compete with the focus you are trying to protect. The one thing a web timer cannot do is block distracting sites, so if that is your failure mode a desktop app or browser blocker is worth adding alongside.
How many Pomodoros should I do per day?
Most students and knowledge workers can sustain 6–8 high-quality Pomodoros per day (2.5–3.5 hours of deep focus). Starting with 4 per day and building to 6–8 over several weeks produces better long-term outcomes than attempting 10–12 from the outset. Track your daily count and treat a consistent 4-Pomodoro day as more valuable than an inconsistent 8-Pomodoro day.

Keep going

Pomodoro Technique courseThe full method in five lessons, with the research.Focus & Deep Work courseDesigning an environment worth timing.Overcome Procrastination courseWhen the problem is starting, not focusing.Study commitment cardDecide when the first interval happens.