Guides for people who take focus seriously
Plain-language pieces on focus sound, brainwave entrainment, and deep work — written under the same rule as our app: if the evidence is mixed, we say it's mixed.
Binaural beats for ADHD focus
What the research actually shows, why "it depends" is the honest answer, and how to run a real two-week test on yourself.
Read the guide → GuideFocus music for ADHD
What separates sound that holds a restless brain from pleasant background noise — and how to set it up.
Read the guide → GuideWhite vs brown noise for ADHD
What the evidence supports, why brown noise feels better to many listeners, and where noise stops helping.
Read the guide → GuideMusic for deep work
Silence, noise, lo-fi, classical, or engineered audio — what each is genuinely good at, and the free options.
Read the guide → GuideBinaural beats without headphones
Why speakers can't produce the effect, and which entrainment techniques work without them.
Read the guide → GuideBeta waves and 18 Hz
What beta-band activity means for attention, and how much of the frequency talk is real.
Read the guide → GuideBinaural vs isochronic vs AM
Three entrainment techniques compared: how each works, what it needs, and which survives real music.
Read the guide → Guide40 Hz gamma and focus
The famous 40 Hz studies were Alzheimer's research in mice. What gamma audio can honestly do, and how to use it.
Read the guide → GuideStudy music that actually works
Why lyrics wreck reading, how to match sound to the task in front of you, and a two-week test that settles it.
Read the guide → GuideHow long a deep work session should be
Where 25, 52 and 90 minutes really come from, how thin the evidence is, and how to find your own number.
Read the guide → GuideDelta waves and sleep sounds
Delta is something your brain produces, not something an app can play. What sleep audio honestly does instead.
Read the guide → GuideNature sounds for concentration
What the restoration research does and doesn't show — and why a loop point costs more attention than the recording buys.
Read the guide → GuideFocus music vs lo-fi
Lo-fi is a production style; engineered focus audio is a mechanism. When the free option is genuinely enough.
Read the guide → GuideApple Watch focus tracking
A wrist can't measure focus — it measures heart rate. What that narrow signal honestly tells you about a session.
Read the guide →Meet the new additions.
CortexDrive™ Depth draws your held attention as a line and leaves a Session Signature. Signature Volume I brings six original 45-minute compositions. The free Chrome extension brings Session Shield to chosen computer websites during your iPhone focus session.
The player has five named pulse strengths and a clearer About sheet. The Vault keeps your hours and receipts. A native Mac app is coming, with one subscription covering iPhone, Mac and Vision Pro. Everything new in 2.3.1 ↗