Free interval timerWork. Rest.
Repeat, without watching the clock.

Set the work, the rest and the rounds, press start, and listen for the cues. A higher tone for work, a lower one for rest, and ticks for the last three seconds.

Get ready

Get ready, round 1 of 10, 10 seconds left

Presets
Work
Rest
Rounds

09:50 in all: a 10-second get-ready, then 10 rounds of 40 seconds with 20 seconds of rest between. 6 minutes 40 seconds of work.

Training every week? Follow a plan that makes it a routine.

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Keeps time in a background tab. Works on a phone. No account, no ads.

interval timer

Why an interval timer and not a stopwatch.

Intervals only work if the switches happen on time, and counting seconds in your head while working hard is how a thirty-second rest becomes fifty. An interval timer takes the counting away: a tone tells you when to go and when to stop, so all of your attention can go on the work.

✦ What it is for

What people use an interval timer for.

HIIT

Short hard efforts with short rests, for as many rounds as you set.

Circuits

One exercise per round, with the rest as the time to move to the next station.

Running intervals

Hard and easy efforts on a road or a track, cued by sound so you can keep your eyes up.

Every minute on the minute

Set rest to zero and one minute per round: start each set at the top of the minute.

✦ How to

How to use the interval timer.

1

Set work, rest and rounds

It starts at 40 seconds of work, 20 of rest and 10 rounds. Pick a preset or change any of the three underneath the timer.

2

Press start

A 10-second countdown gives you time to get into position, then the first round begins with a tone.

3

Follow the tones

A higher tone starts each work period and a lower one each rest, with ticks for the last three seconds. The round count shows how many are left.

4

Finish

A chime marks the end of the last round. Press go again to repeat the whole set.

Every week

One workout is a good day. Three a week is a change.

The start-strength-training plan is three sessions a week, a handful of movements, and adding weight slowly enough to keep doing it. In EvyOS each session can be a habit with a streak, so the weeks add up where you can see them.

✦ Other timers

Timing something else?

Questions

The interval timer, answered.

Choose the seconds of work, the seconds of rest and the number of rounds, or pick a preset such as Tabata (20 seconds on, 10 off, 8 rounds). Press start: there is a 10-second countdown to get ready, then the rounds run on their own.
Yes. A higher tone marks the start of work and a lower one the start of rest, with short ticks for the last three seconds of each. Keep the volume up and do not mute the timer.
It asks the browser to keep the screen awake while it runs, which most phones allow. The timer keeps correct time either way, because it counts to fixed points in time rather than adding up ticks.
Yes. No account, no ads, and nothing to install.

The timer is the easy part.
Doing it again tomorrow is not.

EvyOS holds the goals, projects, tasks, habits and skills the timer is in service of, and keeps the streak of the sessions you actually did.

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