Pomodoro Timer
Focus in sprints. Rest on purpose.
The Zehano Pomodoro timer runs the classic 25-minute work cycle with built-in 5-minute breaks and a longer 15 to 30 minute break after every fourth round. You can customise all durations. It runs entirely in your browser, plays a soft chime at transitions, and never collects your data.
How to use the Pomodoro Timer
- Pick your task. Choose one specific task you can work on with focus for 25 minutes.
- Start the timer. Click the start button. The Pomodoro begins counting down.
- Work with focus. Until the timer rings, work only on that task. No email, no Slack, no quick checks.
- Take the break. When the timer rings, stop. Take a real 5-minute break away from screens.
- Repeat and rest. After four cycles, take a longer 15 to 30 minute break to fully reset.
Benefits
- Lowers the cost of starting. A 25-minute commitment feels manageable. Hard tasks become easier to begin.
- Prevents fatigue. Built-in breaks stop the gradual attention erosion of long unbroken sessions.
- Defends against distraction. The strict no-interruption rule pushes back against the constant interrupt culture.
- Measurable progress. Each completed Pomodoro is a unit of focused work, easy to track and compare.
The science
The Pomodoro technique rests on two well-supported principles. The first is vigilance decrement: sustained attention on a single task fades after 20 to 30 minutes, and short deliberate breaks restore performance close to baseline. Ariga and Lleras' 2011 study in Cognition demonstrated this effect cleanly. The second is task initiation: smaller commitments lower the activation energy required to begin, which fights procrastination. The specific 25-minute number is heuristic rather than precisely calibrated.
Pomodoro works best for tasks with low setup costs. For deep cognitive work with high setup costs (long writing, complex coding), longer Deep Work blocks usually outperform the 25-minute cycle.
Tips for best results
- Take a real break: stand up, look out a window, drink water. Do not scroll your phone.
- Customise the work length if 25 minutes feels too short or too long for your task.
- Defer interruptions during a Pomodoro rather than abandoning the block.
- Track how many Pomodoros you complete each day for an honest measure of focused time.