Entrain: Binaural Beats

Entrain is brainwave entrainment for people who actually use it — built to be precise and potent, not another spa-music app.

Play two slightly different tones, one in each ear, and your brain perceives the difference as a "beat." The frequency-following response gently nudges your brainwaves toward it — toward deep delta for sleep, theta for meditation, alpha for calm focus, or beta for alert work.

PRECISE CONTROL
Set the exact carrier and beat frequency. No mystery presets — see and control the numbers.

THREE MODES
Binaural beats (headphones), isochronic tones (works on speakers), and monaural beats. Switch any time.

DESCENT PROGRAMS
Glide between states over time — drift from relaxed alpha into deep-sleep delta, or ease out of a power nap.

NOISE BEDS
Brown, pink, or white noise under the tones to mask the room.

14 CURATED PRESETS
Deep Sleep, Power Nap, Meditation, Focus, and more — each documented so you know exactly what it does.

SLEEP TIMER
Fade out on your schedule.

Everything is synthesized on your device in real time — nothing streams, nothing is recorded, and the app collects no data at all.