Set the timer to 25 minutes

How to use the online timer

A study session of 25 minutes sits in a decent range for reading a chapter or working through a problem set before your concentration starts to slip. Start the timer, put your phone somewhere you can't see it, and commit to staying on the one task until it finishes rather than switching between subjects every few minutes. Ending on time makes it easier to judge how many blocks a subject needs.

Hit Start whenever you're ready and the timer runs on its own from there, no further clicking required until it finishes. It only counts while the tab stays open, so leave it running in the background rather than closing the browser or navigating away if you need the time to stay accurate. Once it reaches zero, an alarm sound lets you know without you having to keep checking the page.

Setting an egg timer or fumbling with a phone app both work, but neither is as quick as a browser tab you already have open. There's no app store, no update prompt, and no login screen between you and starting the count. It's free and needs no registration, it works on any device with a browser, and closing other tabs won't affect it as long as this one stays open. People type this as set timer 25 minutes or timer for 25 minutes; both land here and start the same count.