20 Minute Timer
Twenty minutes of one thing only.
20 Minute Timer ready. Press start to begin.
Each mark is one minute
Twenty minutes is the nap length sleep researchers keep landing on, the outer edge of a short workout, and a slightly gentler pomodoro for days when twenty-five feels like too much to promise.
What 20 minutes is good for
A power nap
Long enough to be restorative, short enough to stay out of deep sleep.
A shorter pomodoro
The same idea as twenty-five, with a lower barrier on a bad day.
A workout block
Enough for a full circuit without needing to schedule around it.
Reading with an end
A chapter, or as much of one as twenty minutes allows.
Questions
Is twenty minutes the best nap length?
It is the safest short one. Beyond about twenty-five minutes you enter deep sleep, and waking from that leaves you groggier than before you lay down.
Twenty or twenty-five for focus?
Whichever you will actually repeat. The consistency matters far more than the five minutes.
Will it make a sound when it finishes?
Yes — an alarm rings when the countdown reaches zero. The countdown also turns red and the tab title changes to "Time's up", so the end is visible as well as audible.
Does the timer keep running if I switch tabs?
Yes. The countdown runs from a real timestamp rather than counting frames, so it stays accurate in a background tab, and the remaining time shows in the tab title.
The hard part isn’t the timer
This page counts down, and that is all it does. Porotimer handles the part that decides whether the session actually works.

Lock away what breaks focus
Choose the apps you're allowed for the session. Porotimer puts everything else behind a wall until the timer ends — which is the one thing a page in a browser tab can never do.
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Breaks that actually rest you
A calm scene and a breathing guide when the sprint ends, instead of five minutes of scrolling. You come back settled rather than scattered.
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See where the hours went
Every sprint and break laid out in order. The day becomes something you can look back on, rather than something you try to remember.
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