Focus & study timer

Yes, and there’s nothing to sign up for: pick a length and press play. It’s made by Added Time, an iPhone focus app, and the panel under your marks points to that app with a plain link.

Yes. At full time the whistle blows, and the clock rolls on as extra time, still counting toward your marks, until you hold the whistle or press S; extra time counts for up to four hours. Then comes your break. Turn on Roll on in Sound & settings to go straight to the break at full time instead.

Whichever helps you start and keep going. A countdown shows what’s left; a stopwatch shows what you’ve put in, but never says when you’re done. This one does both: it counts up like a stopwatch, toward a goal like a timer, and keeps counting if you’re still going.

Yes. It reads the time from your device’s clock instead of counting ticks, so a background tab, a sleeping laptop or a reload won’t knock it off, and the tab’s title shows the clock. Close the tab before full time and the block settles at full time; close it in extra time and it settles then. Its marks ink in when you’re back. On a phone, the browser doesn’t always say when it closed a page, so extra time may keep counting until you return, for up to four hours.

Just use the timer. Every half hour you focus inks a tally mark on today’s page, and beneath the marks are your totals for today, this week and all time, kept in this browser with no account. For hours by subject, daily goals and a record kept on your phone, there’s Added Time for iPhone, where the whole record is free.

Yes. Choose 30 · 5 (with 15 minutes after every fourth block), 60 · 10, or Your own: blocks from 1 to 120 minutes and breaks up to 60, such as 25 and 5, 50 and 10, or 90 and 20. Set “Long break after” to 0 for no long breaks. A change starts with the next block or break, so the one you’re in keeps its length.

Choose 60 · 10 and press play, or press Space. The clock counts up to 60:00 and the whistle blows, and each half hour of it inks a stroke on today’s page. Every break is 10 minutes. Want longer? Choose Your own and set a block of up to 120 minutes.

Yes: minutes and seconds, on split-flap digits. Past an hour it keeps counting in minutes, so 75 minutes reads 75:00, the way a match clock does. It’s a timer rather than a clock, so it shows your focus, not the time of day.

Yes, in any modern browser, on a phone, laptop, PC or Mac. A phone may pause the page while the screen is locked or you’re in another app. The clock is right again the moment you come back, but the whistle may not reach you in the meantime. Added Time for iPhone keeps the clock on your lock screen, with a working whistle.

The clock holds exactly where it is, and an orange counter beneath it counts the pause up as added time. Resume, and the counter folds away; its total stays beside the clock for the rest of the block (of 30′ · +02:10). The minutes you’d already put in are kept, and you never start again.

Every half hour you focus adds a tally mark to your day: a slash for 30 minutes, and a second stroke crosses it at 60. Each stroke inks the moment its half hour clicks over. Nothing is rounded away, so a 20-minute block leaves most of a slash, and the next block finishes it.

In this browser’s local storage, on this device only: the date, the minutes played and the length of each block, your settings, and the clock that’s running. There’s no account, and your marks never leave this browser. “Erase my hours from this browser” above erases your marks and totals; clearing this site’s data in your browser removes everything else too. The privacy policy has the details.

Yes: Added Time, free on the App Store for iPhone (iOS 18 or later). It is the same match clock, with subjects and daily goals, your whole record by the day, week and career, and the clock on your lock screen. It can also step distracting apps aside while you focus.