White Noise
Constant power across all frequencies. Ideal for masking distracting speech.
FREQUENCY: HIGH
25 Minute Timer
The standard Pomodoro block. One task, twenty-five minutes, nothing else.
25:00
Ready
Nothing selected
Sound Library
Calibrated frequencies for deep work and relaxation.
Color Noises
Continuous frequencies for auditory masking.
Brown Noise
Deep, bass-heavy rumble reminiscent of a distant waterfall or thunder.
FREQUENCY: LOW
Pink Noise
Balanced spectrum that sounds more natural to the human ear, like steady rain.
FREQUENCY: BALANCED
Red Noise
Even deeper than Brown noise, focusing heavily on the low-end spectrum.
FREQUENCY: LOW
Black Noise
Near-silence with subtle low-frequency drift. Meditative, like the sound of a quiet room at night.
FREQUENCY: NEAR SILENT
Grey Noise
Psychoacoustically equalized to sound equally loud at every frequency.
FREQUENCY: EQUALIZED
Ambient Sounds
Natural soundscapes recorded in high fidelity.
Rain
Gentle rainfall creating a natural, soothing atmosphere perfect for deep concentration.
SOURCE: RECORDED
Rain on Tent
Rainfall on a tent canvas — cozy, immersive and deeply relaxing for focused work.
SOURCE: RECORDED
Ocean Waves
Rhythmic ocean waves rolling onto shore — a timeless natural soundscape for calm focus.
SOURCE: RECORDED
Wind
Steady breeze flowing through open spaces — airy and expansive for clear thinking.
SOURCE: RECORDED
Forest Stream
A gentle brook flowing through a quiet forest — peaceful and grounding for deep work.
SOURCE: RECORDED
Meadow
Birds and insects in a sunlit meadow — warm, organic ambience for relaxed focus.
SOURCE: RECORDED
Binaural Beats
Brainwave entrainment through stereo frequency offset. Layers with any noise above.
Headphones required for binaural effect
Delta
Deep sleep and healing. Ultra-low 2 Hz beat for total relaxation.
BEAT: 2 Hz
Theta
Meditation and creativity. 6 Hz beat for deep introspection and flow.
BEAT: 6 Hz
Alpha
Calm focus and learning. 10 Hz beat for relaxed concentration.
BEAT: 10 Hz
Beta
Active thinking and energy. 14 Hz beat for alertness and problem solving.
BEAT: 14 Hz
Why twenty-five
The number is not derived from anything. Francesco Cirillo, a university student in the late 1980s, worked in ten-minute blocks with a tomato-shaped kitchen timer and lengthened them until he found a size that held. Twenty-five is what survived testing, and forty years of people using it have not produced a better default.
What makes it work is the ratio. It is long enough to get past the first few minutes of resistance and into the task, and short enough that you can see the end from the beginning — which is what makes committing to it easy.
The rules that make it work
A twenty-five-minute timer is trivial. The discipline around it is the part that does the work, and it comes down to three things.
- One task. Decide before you start. Switching mid-block defeats the point.
- No interruptions. If something occurs to you, write it down and carry on. It will still be there in twenty-five minutes.
- Take the break. Skipping breaks to keep momentum is how a good afternoon turns into an exhausted evening.
Sound and the block
A consistent audio background makes the block easier to enter, partly through masking and partly through association — after a week, the sound itself starts to mean work. Set it once and stop fiddling with it. Brown noise is the most common choice here; white noise is stronger against nearby conversation.
If you want the full cycle — four rounds, short breaks between them, a long break at the end, with the sound switching automatically at each phase — use the Pomodoro timer rather than resetting this one by hand.
Common questions
Why is the Pomodoro timer 25 minutes?
Because that is the length Cirillo settled on after starting at ten and testing longer blocks. There is no theoretical basis for the exact number — it is the length that most people can commit to without negotiating and still get real work done in.
What if I am in flow when it ends?
Purists stop anyway, on the grounds that a reliable rhythm beats an occasional long run. In practice, finishing your current thought and then taking the break costs little. What does cost you is skipping breaks repeatedly.
Can I run four rounds automatically?
Yes — use the Pomodoro timer. It handles four focus rounds, the short breaks between them and the long break at the end, and switches the background sound at each phase change.