Byna: Binaural Beats & Sleep

Fall asleep faster. Focus deeper. Meditate without the noise.

Byna plays two slightly different tones -- one in each ear -- and your brain does the rest. It's called binaural beats, and it's been studied since the 1970s. Your brainwaves naturally sync to the difference between the tones, gently guiding you toward the state you choose.

Completely free. No ads. No accounts. No data collection. Ever.

-- 7 SCIENCE-BACKED PRESETS --

Each preset is tuned to a specific brainwave band:

• Wind Down (Delta, 2 Hz) -- Ease into deep sleep
• Quick Recharge (Delta, 3 Hz) -- A restorative pause
• Open Mind (Theta, 5 Hz) -- Explore quiet awareness
• Still Mind (Theta, 6 Hz) -- Settle into meditation
• Quiet Focus (Alpha, 10 Hz) -- Calm, clear concentration
• Deep Work (Beta, 18 Hz) -- Sustained mental focus
• Peak Awareness (Gamma, 40 Hz) -- Heightened clarity

-- REAL-TIME AUDIO SYNTHESIS --

Byna generates pure tones in real time -- no pre-recorded loops, no compressed audio files. Each session creates fresh sine waves at precise frequencies, so what you hear is mathematically exact. Carrier frequencies are held in the 200-500 Hz range where binaural perception is strongest.

-- VISUAL ANIMATIONS --

4 animation modes -- Pulse, Morph, Glow, and Ripple -- sync to your session's beat frequency. Watch the visuals breathe at the same rhythm your brain is following, or close your eyes and just listen.

-- PINK & BROWN NOISE --

Layer soft pink or brown noise under your binaural tones to mask distracting sounds. Helpful in noisy environments or when the pure tones feel too exposed on their own.

-- THOUGHTFUL DESIGN --

• Sessions start with a gentle fade-in and gradual frequency progression
• Volume is capped at 70% for hearing safety
• Sleep presets skip the fade-out (because you're asleep)
• Works completely offline -- no internet needed
• Keep Screen On option for uninterrupted visual sessions
• Auto-fullscreen mode for immersive listening

-- WHY FREE? --

Most binaural beats apps charge $10-15/month for what is, at its core, two sine waves. The science is public domain. The math is simple. Byna exists to prove that a good binaural beats experience doesn't need a paywall.

No premium tier. No "unlock for $9.99/month." Just headphones and a calm mind.

-- HEADPHONES REQUIRED --

Binaural beats only work with headphones or earbuds. Each ear needs to hear a different frequency for the effect to occur. Any wired or wireless headphones will work.

Built with care. Free forever.