Timer
Ready
Space start/pause
↑↓ ±1m
S skip
R reset
T theme
A auto-start
Ready
Drift-free focus cycles with history, streaks, chime alerts, and JSON export
The Pomodoro Technique was developed by Francesco Cirillo in the late 1980s as a time management method built on the idea that frequent, structured breaks improve sustained concentration rather than interrupting it. The 25-minute default sits at the boundary where most people can maintain deep focus before attention starts to drift. Shorter sessions rarely generate the depth needed for complex work; longer ones accumulate fatigue that a short break can reset.
The countdown runs inside a dedicated browser worker thread and anchors to a fixed deadline timestamp rather than a decrementing counter. Pausing the tab, hiding the window, or a brief system lag never causes the timer to gain or lose seconds.
Each session records a start time, end time, duration, and completion status. The Day Streak counts consecutive calendar days with at least one completed work session. Work-in-a-row tracks consecutive completed work sessions without a reset or skip.
The end-of-phase chime is a three-tone synthesized sequence generated directly in the browser with no audio files to load. Browser notifications fire when the page is in the background so a completed session never goes unnoticed.