Focus Timer with Break Reminders

The timer alternates focused work with planned rest. With the classic settings you work for 25 minutes, rest for 5, and after every 4 focus blocks take a longer 15-minute break. Four blocks with their breaks take 2 hours 10 minutes: 100 minutes of focus, 15 minutes of short breaks and a 15-minute long break.

The approach was popularized by Francesco Cirillo in the late 1980s, who timed study sessions with a kitchen timer. This is a generic pomodoro-style timer, not an official product. You can change every length, choose a Deep work preset (50 minutes on, 10 off) or a Gentle start preset (15 minutes on), skip a phase, and decide whether the next phase starts automatically.

Short, clearly bounded work periods can make starting easier for people who struggle with procrastination or attention, including many people with ADHD, though the method is not a treatment. A visible countdown and an optional gentle chime (off by default) give an external cue to switch tasks.

Browsers slow down timers in background tabs to save battery. This timer calculates the remaining time from the real clock, so it catches up correctly when you return. Nothing about your sessions is saved or sent anywhere.