What is the Pomodoro technique?

Developed by Francesco Cirillo in the late 1980s, the Pomodoro technique divides work into 25-minute focused sessions ("pomodoros") separated by 5-minute breaks. After four pomodoros, a longer 15–30 minute break follows. Research shows this structure helps maintain concentration, reduces mental fatigue, and creates a sustainable rhythm for knowledge work.

Do the ambient sounds require downloading anything?

No. All audio is generated in real time using the Web Audio API — oscillators, filters, and gain nodes create the soundscapes programmatically. No audio files are downloaded or streamed. This means the sounds work offline and load instantly.

What is binaural 40Hz and does it actually help focus?

Binaural beats are an auditory illusion where two slightly different frequencies (e.g., 200Hz in one ear and 240Hz in the other) cause the brain to perceive a 40Hz beat. Gamma waves at 40Hz are associated with focused cognitive states in EEG research. The effect is subtle and works best with headphones. Wear headphones for this mode — without them, the stereo separation needed for the effect does not work.

Can I change the Pomodoro duration?

Yes. Click the timer settings icon to change work session length (typically 20–50 minutes), short break length (typically 5–10 minutes), and long break length (typically 15–30 minutes).

Which background color is best for focus?

Research on color and cognition suggests warm neutral tones (beige, warm gray) support sustained attention for creative work. Cool tones (blue-gray, dark navy) are associated with analytical thinking. Pure white is highest energy and can cause eye strain over long sessions. Dark backgrounds reduce eye strain in low-light environments. Experiment to find what works for your individual focus pattern.

Does the timer work in fullscreen?

Yes. The Pomodoro timer is displayed in a minimal, low-contrast format in the corner of the fullscreen. It shows remaining minutes and the current session number without demanding visual attention.

Focus Mode

A blank fullscreen with Pomodoro timer, ambient sound, and soft colors for deep work and studying.

Last updated: April 2026

Background

Work duration

25 min

Ambient sound

Session goal

Press Begin Session to start

What it does

Customizable Background

Choose from 5 presets — warm beige, soft gray, dark navy, pure black, pure white — each optimized for a different type of work and ambient light condition.

Pomodoro Timer

25-minute work sessions with 5-minute breaks, configurable to any interval. A subtle progress indicator and session counter track your day without demanding attention.

Ambient Sounds

Three synthesized soundscapes — rain (8 detuned oscillators), brown noise (filtered noise), and binaural 40Hz (200 and 240Hz tones on separate ears) — all generated in the browser with no downloads.

Mantra / Goal Text

Type your session goal — "Finish chapter 3", "Close 5 tickets" — and it appears as subtle, centered text in fullscreen. A quiet reminder of what you're working toward.

Session History

A local session counter tracks how many Pomodoros you complete during the session, giving you a simple measure of focused work without a distracting dashboard.

How to use Focus Mode

1
Choose your background
Select a background preset that matches your energy: warm beige for creative work, soft gray for analytical tasks, dark navy for evening sessions.
2
Set your goal (optional)
Type a short session intention in the mantra field — it will appear as a subtle reminder during your session.
3
Choose ambient sound
Select rain for relaxed focus, brown noise for high-concentration analytical work, or binaural 40Hz for creative or study sessions.
4
Enter fullscreen
Click "Begin Session" to start the Pomodoro timer and enter fullscreen. The screen shows only your goal text and the timer.
5
Work through cycles
Work until the timer ends (a subtle chime plays). Take your 5-minute break, then start the next session.

When to use this

Deep work sessions

Knowledge workers doing complex writing, coding, or analysis benefit from eliminating visual notifications and desktop clutter. The fullscreen blank removes everything except the timer.

Student study sessions

Students using the Pomodoro technique for exam prep run 25-minute focused reading or practice sessions with 5-minute movement breaks. The timer is visible without being a distraction.

Creative work

Writers and artists often find warm beige or soft gray backgrounds more creatively stimulating than blank white. The mantra input lets you hold your creative intention in peripheral awareness.

Meditation and mindfulness

The solid-color fullscreen with ambient rain or brown noise provides a calm, boundary-setting environment for guided meditation or breathing exercises without a dedicated app.

Reducing evening blue light

Switch to dark navy or pure black with binaural sounds in the evening for a winding-down routine that signals the body to prepare for sleep.

The Science of Blank Screens and Cognitive Load

Every visual element in your environment — notifications, icons, open browser tabs — occupies a small amount of working memory even when you are not actively attending to it. Researchers call this "attentional residue." A blank fullscreen eliminates peripheral visual processing demand, freeing that cognitive bandwidth for the primary task.

The color of the blank screen matters less than its blankness. What the research consistently shows is that removing environmental complexity — not finding the optimal color — produces the most significant focus improvement. The timer and goal text in focus mode are designed to be below the threshold of attentional demand: present enough to orient without drawing focus away from work.

Ambient Sound and the Cocktail Party Effect

The brain's auditory system is specifically tuned to detect meaningful patterns — words, voices, alarms — in noise. When working in silence, any ambient sound (a conversation, a phone notification) immediately captures attention. When working in consistent noise, the brain filters out the steady-state sound as "background" and becomes less reactive to new sounds in the environment.

This is why cafes often enhance productivity: the consistent ambient sound provides a masking layer that reduces the salience of distracting environmental sounds. Brown noise and synthesized rain approximate this effect. The binaural 40Hz mode works differently, through a direct neurological entrainment mechanism rather than masking — it requires headphones to function.

Frequently Asked Questions

What is the Pomodoro technique?: Developed by Francesco Cirillo in the late 1980s, the Pomodoro technique divides work into 25-minute focused sessions ("pomodoros") separated by 5-minute breaks. After four pomodoros, a longer 15–30 minute break follows. Research shows this structure helps maintain concentration, reduces mental fatigue, and creates a sustainable rhythm for knowledge work.
Do the ambient sounds require downloading anything?: No. All audio is generated in real time using the Web Audio API — oscillators, filters, and gain nodes create the soundscapes programmatically. No audio files are downloaded or streamed. This means the sounds work offline and load instantly.
What is binaural 40Hz and does it actually help focus?: Binaural beats are an auditory illusion where two slightly different frequencies (e.g., 200Hz in one ear and 240Hz in the other) cause the brain to perceive a 40Hz beat. Gamma waves at 40Hz are associated with focused cognitive states in EEG research. The effect is subtle and works best with headphones. Wear headphones for this mode — without them, the stereo separation needed for the effect does not work.
Can I change the Pomodoro duration?: Yes. Click the timer settings icon to change work session length (typically 20–50 minutes), short break length (typically 5–10 minutes), and long break length (typically 15–30 minutes).
Which background color is best for focus?: Research on color and cognition suggests warm neutral tones (beige, warm gray) support sustained attention for creative work. Cool tones (blue-gray, dark navy) are associated with analytical thinking. Pure white is highest energy and can cause eye strain over long sessions. Dark backgrounds reduce eye strain in low-light environments. Experiment to find what works for your individual focus pattern.
Does the timer work in fullscreen?: Yes. The Pomodoro timer is displayed in a minimal, low-contrast format in the corner of the fullscreen. It shows remaining minutes and the current session number without demanding visual attention.

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