52 minutes of work, 17 minutes off, repeat. The split comes from a time-tracking company called Desktime, which looked at how its most productive users arranged their days and found the top ten percent clustered around 52 on and 17 off rather than the neat 25/5 everyone hears in a workshop. This is that rhythm as a countdown, nothing more.
It is for anyone whose work does not fit in a 25-minute box: problem sets, lab reports, a chapter where the first ten minutes are just finding your place. Short blocks make you stop while you still know what you were doing, which is fine for email and useless for anything needing a run up.
The one thing worth knowing before you press Start: this timer does not move on its own. Every phase ends and waits for you to press the button again, which is either a feature or a trap depending on how you take breaks.
A focus timer that runs 52 minutes of deep work followed by 17 minutes of rest, based on the 52/17 productivity method.
How it works
Press Start and the display counts down from 52:00, phase marked Focus, hint reading “Deep work. No distractions.” At zero the cycle counter goes up by one, the label switches to Break, the hint tells you to step away from the screen, and the button reads Start Break. Press it and the 17 minutes run. At zero the timer flips back to focus at 52:00 and the button reads Start.
Start doubles as Pause: press it mid-session and the clock stops, reading Resume, or Resume Break if you were breaking. Cycles only increase when a full focus block reaches zero, so a session you abandoned does not get credit. Reset puts everything back to 52:00 and clears the count.
There is no sound. The phase change is a text change on the page, so if the tab is buried behind three others you will not hear a thing. Fair enough on a study site – no beeping in a library – but it means the timer has to be somewhere you can see it.
A worked example
You press Start at 9:00. Focus runs 9:00 to 9:52, the counter reads 1, and after a press the break runs 9:52 to 10:09. Second block 10:09 to 11:01, break to 11:18. Third block 11:18 to 12:10, counter reads 3, break to 12:27.
So three cycles end at 12:27, and they deliver 156 minutes of focus – two hours and thirty-six minutes – inside 207 minutes of wall clock, with the three 17-minute breaks making up the difference. Take it to four complete cycles and you get 208 minutes of focus across four hours and thirty-six minutes, because 52 plus 17 is 69 minutes per lap.
The ratio is 156 out of 207, which is 75.4% of elapsed time spent working. Compare 25 on and 5 off, where each lap is 30 minutes and the ratio is 83%: the shorter cycle is technically more efficient and practically worse, because you spend it starting rather than being in the middle of something. Pick on the size of the work, not the percentage.
What it will not do for you
It does not start the next phase automatically. That is the trap: a 17-minute break with no alarm on the other end becomes a 40-minute break the first time a message arrives, and the counter will not scold you. If you want the next block to begin without a decision from you, a timer that runs on its own is the better tool.
It also keeps no record. Cycles live in the page and vanish on close, so there is no daily total, no streak, no report of focus minutes banked this week.
And the split is not a law. It was an observation about people using tracking software, not a finding about your brain. If 52 minutes is too long for the work in front of you, take a shorter block rather than fighting the number.
Other tools
- 90-Minute Focus Timer — the longer ultradian block, one session at a time
- Count-Up Flow Timer — counts up instead, so there is no deadline staring at you
- Distraction-Free Timer — one number on the screen and nothing else
Frequently asked questions
Do I have to take the full 17 minutes?
No, but take something. The break is part of the method, not padding: 52 minutes of concentration costs you a rest of roughly a third of that in return. Stand up, get water, look at something that is not a screen. Five minutes keeps the next block usable, and nobody ever did better work by checking one more thing.
Why does the timer stop instead of carrying on?
So you choose the next block rather than drift into it. The cost is that you also choose when the break ends, which is where this design fails for some people. Breaks keep turning into an hour? Use a timer that starts itself.
Can I change the 52 and 17?
Not on this page. The numbers are the method, and a timer you can configure is a timer you will configure into the shape of your worst habits. Need a different split? Pick a different tool.
How many cycles should I do a day?
Three or four is a full day of real work for most people – around three and a half hours of focus by the arithmetic above. Chasing six because the counter allows it is how you turn up tomorrow unable to start. The counter tracks, it does not set a target.
Does it run when I switch tabs?
The countdown keeps going while the page is open, but you will not see the phase change and you will hear nothing. Keep the tab visible, or accept that you might come back to a break that already finished.