White Noise
Constant power across all frequencies. Ideal for masking distracting speech.
FREQUENCY: HIGH
20 Minute Timer
Twenty minutes — the nap length, the meditation length, and a good short study block.
25:00
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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
The most-used twenty minutes
Twenty minutes turns up in more contexts than any other short duration. It is the length usually recommended for a nap that leaves you sharper rather than groggy, because it generally keeps you out of deep sleep. It is the standard sitting for most secular meditation practice. And it is a common length for a revision block among students who find twenty-five slightly too long to sustain.
None of those are the same activity, but they share a shape: long enough to settle into, short enough that you do not need a plan for the middle of it.
Setting it up for each
For a nap, the audio matters more than the timing. Something steady and dark — brown noise or pink noise — covers the sounds that would otherwise wake you, and by default playback stops when the countdown ends.
For meditation, the opposite: the lightest possible floor. Black noise, or a theta binaural preset at low volume on headphones, gives you something to sit in without giving attention anything to grab.
For study, treat it as a short Pomodoro. Set the sound before you start, not during, and do not adjust anything until it ends.
Twenty versus twenty-five
If twenty-five minutes reliably ends with you drifting in the last few minutes, twenty is the better block for you and there is nothing to prove by forcing the standard. Blocks are supposed to fit the person. Try both for a week and keep whichever you actually finish.
Common questions
Is 20 minutes the right nap length?
It is the length usually recommended for a short nap, on the basis that it tends to keep you out of deep sleep and therefore avoids the grogginess of waking mid-cycle. Individual results vary — some people do better with ten.
What sound should I use for meditation?
The lightest option available. Black noise gives you a near-silent floor, and a theta binaural preset at low volume on headphones adds a slow beat without a recording to identify.
Twenty minutes or twenty-five for studying?
Whichever you finish without drifting. Twenty-five is the convention, not a rule; if you fade in the last few minutes, twenty is genuinely the better block.