How the cycle works
You work for the full session length without checking anything else, then take the short break. After four cycles, take a longer break (15 to 30 minutes). The technique only works if the break is genuinely a break — get up, walk around, do not open another screen.
The longer write-up of why this matters is in the Pomodoro guide. The TL;DR is that the breaks are not optional — they are the technique.
Choosing a timer for study
If you are using this as a timer for study, start smaller than your ambition. A 25-minute block is best when you are avoiding the task or warming up. Move to 50/10 once you are already settled, and save 90/15 for reading, writing, or problem sets where context-switching would cost more than the long block helps.
For the research-backed reasoning behind those session lengths, use the study session length guide. For a plain countdown with any custom duration, use the custom online timer.
If you want the full setup around the countdown, use the timer for study routine: it covers what to write before starting, how to choose the smallest useful interval, and what to do during breaks.
Timer for study FAQ
What is the best timer for study?
For most students, start with a 25-minute focus block and a 5-minute break. Use 50/10 when you are already warm, and 90/15 only for deep work where you can protect the full session.
Which study timer preset should I choose?
Use 25/5 for warm-up, procrastination, or flashcards. Use 50/10 for settled reading, writing, and problem sets. Use 90/15 only when you can protect the whole block without interruption.
What happens after four Pomodoro cycles?
After the fourth work block, the timer switches to a long break of at least 15 minutes. After the long break, the cycle resets to Pomodoro 1 of 4 and starts again.
Can I customize the work and break lengths?
The presets cover the most common study variants: 25/5, 50/10, 90/15, and a short 15/3. For arbitrary custom lengths, use the homepage countdown timer instead.
Does the timer keep running if I lock my phone?
The countdown stays accurate because it reads the system clock, but mobile browsers may throttle background audio when the screen is locked. Keep the screen on if the alarm needs to be reliable.
Why are short breaks so important to the technique?
The breaks are the technique. Without them, a Pomodoro is just a 25-minute timer. The cognitive reset between blocks helps you sustain several focused study sessions instead of fading after one or two.