Krill KitsKrill Kits// A swarm of small, sharp tools for letters, numbers, and units.
§ 01 / TOOL

Pomodoro.

STATUS READYDEFAULT 25 / 5 / 15AUDIO ON
> WORK
CYCLE 1/4
25:00.

Settings.

MINUTES
// WORK
// BREAK
// LONG BREAK
// CYCLES
× WORK
§ 02 / ABOUT

How Pomodoro works.

The Pomodoro Technique is dead simple: pick one thing, work on it for 25 minutes without switching, take a 5-minute break, repeat. After four 25-minute blocks, take a longer 15–30 minute break and start over. Named after a tomato-shaped kitchen timer (pomodoro = tomato in Italian) by Francesco Cirillo in the late 1980s.

// WHY IT WORKS

Two reasons. First, 25 minutes is short enough to commit to without dread — “I’ll do just 25 minutes” is a much easier sell than “I’ll do focused work all afternoon.” Second, the forced break interrupts the diminishing-returns curve before fatigue sets in, so the next block starts fresh instead of grinding.

// HOW TO USE THIS TIMER

  • Start — begin the current phase. Press once and walk away.
  • Pause — freeze the countdown if you have to take a phone call. Resume picks up where you left off.
  • Skip — jump straight to the next phase. Useful if you finish early or got pulled away.
  • Reset all cycles — clear the cycle counter back to zero. Use at the start of a new session.

// CUSTOMIZE

The defaults are a starting point. Coding might want 50/10. Deep writing or design might want 90/15. Adjust the WORK, BREAK, LONG BREAK, and CYCLES fields below the timer — they save to your browser so you don’t have to re-enter every visit.

// AUDIO CUE

A short beep marks each phase transition — higher pitch when work ends (time to relax), lower when a break ends (back to it). Browsers block audio until you interact with the page, so the first Start click also unlocks the speaker.

§ 03 / FAQ

Pomodoro questions.

What is the Pomodoro Technique?+
Francesco Cirillo’s 1980s focus method: 25 minutes of single-tasking, then a 5-minute break, repeated four times, then a longer 15–30 minute break. Named after a tomato-shaped kitchen timer (pomodoro = tomato in Italian).
Why those specific durations?+
They’re a starting point, not gospel. 25 minutes is short enough that you can usually commit to it without dread but long enough to make real progress on a task. Adjust to your work — coding might want 50/10, deep writing might want 90/15. The defaults are editable.
Can I close the tab and come back?+
The phase resets if you close the tab — there’s no persistence between sessions (yet). The timer is honest within a session: switching tabs or sleeping the laptop briefly won’t lose time because we anchor on performance.now().
What’s the audio cue?+
A short sine-wave beep — 660Hz when work ends, 440Hz when a break ends. Plays once per phase transition. Browsers block audio until you interact with the page, so the first start click also unlocks audio. If you don’t hear anything, your tab is probably muted.
§ 04 / TOOLS

Related calculators.

§ 05 / READING

Deeper dives.