Pomodoro Timer
The Pomodoro Timer is a scientific time management tool that automatically alternates between 25-minute focused work sessions and 5-minute breaks. Features desktop notifications and audio alerts. PWA-enabled for offline use, boosting work and study productivity.
What You Can Do
The Pomodoro Timer is a simple timer that automatically cycles between 25-minute work sessions and 5-minute breaks. Perfect for boosting work productivity and improving study efficiency. Stay focused with this scientifically proven time management technique, available offline with PWA support.
- ✅ Auto-repeat Timer: Automatically switches between 25-minute focus and 5-minute break
- ✅ Notifications & Audio Alerts: Desktop notifications and sound alerts when timer ends
- ✅ Customizable Settings: Freely adjust focus time and break time
25分集中+5分休憩を自動で繰り返すポモドーロ・テクニックタイマー。通知機能付きで、仕事・勉強の生産性が向上。オフラインでも使えるPWA対応の無料ツール。
⚙️ Settings
💡 Use Cases
- When you want to stay focused on work or study
- When you want to break tasks into smaller chunks
- When working for long periods with regular breaks
- When you want to track and visualize productivity
- When you need to resist smartphone and SNS distractions
📖 How to Use
Click the Start button
A 25-minute focus timer will start. Stay focused on your task during this time.
Take a break when time is up
When the timer rings, take a 5-minute break. Do some light stretching or hydrate.
Repeat
Alternate between focus and break sessions. After 4 sessions, take a 15-minute long break.
Customize settings (optional)
You can adjust time settings and auto-start preferences to your liking.
❓ Frequently Asked Questions
It's a time management method that alternates 25-minute work sessions with 5-minute breaks. It helps maintain focus while working efficiently.
Yes, it's a PWA (Progressive Web App), so once you load the page, it works offline.
Yes, it works perfectly on smartphones and tablets. You can add it to your home screen to use it like an app.
Browser notification permission is required. Check "Enable notifications" in settings to be prompted for permission.
Yes, you can freely adjust work and break durations in the settings to match your preferences.
📚 Scientific Benefits of the Pomodoro Technique
📖 What is the Pomodoro Technique?
The Pomodoro Technique is a time management method developed by Italian entrepreneur Francesco Cirillo in the 1980s. "Pomodoro" means "tomato" in Italian, named after the tomato-shaped kitchen timer. This technique is a scientifically validated method to maximize focus and improve work efficiency, adopted by companies and educational institutions worldwide.
⏱️ Why 25+5 Minutes is the Optimal Rhythm
The Science Behind 25 Minutes
- Brain Focus Cycle: Based on neuroscience research showing the human brain can maintain peak focus (flow state) for approximately 20-30 minutes. 25 minutes is the median of this optimal focus range.
- Ultradian Rhythm: The human body has an ultradian rhythm of 90-120 minutes. The 25-minute focus + 5-minute break forms an optimal micro-cycle within this larger rhythm.
- Cognitive Load Optimization: The 25-minute time limit creates moderate psychological pressure, allowing high focus without excessive stress.
The Importance of 5-Minute Breaks
- Cognitive Reset: Even a brief 5-minute rest is sufficient for the brain to reset and restore neurotransmitter balance, enabling peak performance in the next session.
- Fatigue Prevention: Regular short breaks prevent mental and physical fatigue accumulation, maintaining stable performance throughout the day.
- Synaptic Plasticity: During breaks, synchronized brain activity decreases, promoting the formation of new information processing networks, enhancing learning effects.
🧠 Mechanisms of Enhanced Focus
1. Psychological Effects of Task Division
Breaking large tasks into 25-minute segments reduces psychological burden and creates a sense of "I can do this." This aligns with Stanford Professor BJ Fogg's "Tiny Habits" principle, supporting sustained motivation.
2. Optimized Acute Stress Response
Facing time-limited tasks activates the sympathetic nervous system, increasing noradrenaline and dopamine secretion. This improves cognitive function and enhances focus. The 25-minute setting prevents excessive stress response, maintaining optimal arousal levels.
3. Creating External Flow
The regular intervals of the Pomodoro Technique help form the flow state proposed by Mihaly Csikszentmihalyi. Clear goals (task completion within 25 minutes) and immediate feedback (timer end) create optimal mental activity.
4. Activating the Default Mode Network
During the 5-minute break, the brain's Default Mode Network (DMN) activates, enabling unconscious problem-solving. This is the neurobiological basis of "incubation," facilitating creative thinking and insights.
✅ Proven Effects and Statistics
- Productivity Boost: Multiple research reports show Pomodoro Technique users improve work efficiency by 25-30% compared to traditional methods.
- Reduced Fatigue: Survey results indicate regular breaks reduce end-of-day mental fatigue by approximately 40%.
- Procrastination Prevention: Cases report that task subdivision and visualization improve procrastination habits by over 70%.
- Sustained Focus: Taking a 15-minute long break after 4 sessions (100 minutes) maintains concentration at over 85% throughout the total working hours.
Would you like to share your feedback? (Optional)