Session routines
Chain states into one hands-free session such as Focus → Relax, Deep Work or Wind Down, or build and save your own.
Four ready-made modes, plus a Custom mode where you set the left and right frequencies yourself.
Binaural beats for focus, calm and deep sleep
MindSync plays a slightly different tone in each ear so your brain hears a third rhythm. Pick Focus, Relax, Meditate or Sleep, add rain or ocean, and press play. Free, with no ads and no account.
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Free · No ads · No account
How binaural beats work
Two waves, one beat.
A slightly different tone in each ear makes your brain hear a third rhythm — the binaural beat.
Headphones recommended.
Headphones give each ear its own tone for the full effect. Speakers work too, but the beat is subtler as the sounds mix in the air.
Pick your state.
Focus, relax, meditate or sleep — tuned presets, or dial in your own frequencies.
Four brainwave modes, tuned for you
Each mode uses a 200 Hz carrier in the left ear and a slightly higher tone in the right. The difference is the beat you perceive.
Beta · 13–30 Hz
18Hz
Focus
Alert, concentrated, active thinking. Ideal for deep work and study.
Alpha · 8–13 Hz
10Hz
Relax
Calm awareness and stress relief. Unwind between tasks or after work.
Theta · 4–8 Hz
6Hz
Meditate
Deep relaxation, creativity and meditation. Settle in and let go.
Delta · 0.5–4 Hz
3Hz
Sleep
A slow, deep rhythm for winding down and falling asleep.
Layered ambience + Sleep ramp
Mix in soft noise, deep noise, rain or ocean, generated on your device, with a sound tone control from low to high.
Slowly lowers the beat toward deep sleep and dims the screen while you drift off.
Journey and streaks
See today, the last 7 days and all-time listening, plus your day streak. Favourites and a Continue card get you back fast.
Private by design · 10 languages
No account, no ads, no trackers. Your favourites, sessions and history stay on your device.
English, Arabic, German, Spanish, French, Italian, Japanese, Korean, Portuguese and Chinese, with full right-to-left support.
Background and lock screen
Audio keeps playing with the screen locked, fades in and out smoothly, and can be paused from the lock screen.
Live wave visuals
Watch the left ear, right ear and perceived waves on an oscilloscope. Slow the animation if you are motion-sensitive.
Tuned presets or your own
Four ready-made modes, plus a Custom mode where you set the left and right frequencies yourself.
Hear it in 10 seconds
Put on headphones and play a 10 Hz alpha beat: 200 Hz in your left ear, 210 Hz in your right. Keep the volume low.
Browser demo only. The app adds fades, ambience, timers and background playback.
Listen safely
Listen safely: keep volume comfortable and never use while driving or operating machinery. If you are sensitive to flashing or motion, lower the wave animation speed in the player. Not a medical device.
FAQ
What are binaural beats?
A binaural beat is the rhythm your brain perceives when each ear hears a slightly different tone. A 200 Hz tone in one ear and 210 Hz in the other is heard as a 10 Hz pulse, which sits in the alpha range linked with relaxed awareness.
Is MindSync free?
Yes. MindSync is free, has no ads and does not need an account.
Which devices does MindSync support?
MindSync is built for iPhone and Android phones. Download links will appear on this page at launch.
Why do I need headphones?
Binaural beats rely on each ear hearing its own tone. Speakers still work, but the effect is subtler.
How long should I listen?
Start with 15–30 minutes. Use the timer, or leave it on infinite for sleep.
Does it play in the background?
Yes. Audio continues with the screen locked, and you can pause from the lock screen.
Is it a medical treatment?
No. MindSync is for relaxation and focus and is not a medical device.
Research on binaural beats is mixed, and MindSync makes no medical claims.
Two waves. One frequency in your mind.
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