Tune your space
for
calm.focus.sleep.balance.
Eunoia turns precise frequencies, solfeggio tones and color noise into sound you can see — a frequency generator and cymatics visualizer for calm, focus and inner balance.
Visualize and feel the frequencies
Everything in one place
A full frequency toolkit
From a precise tone generator to chakra tones, golden-ratio sequences and color noise — built for exploring the science of sound.
Frequency Generator
Play any tone from 0 to 22,000 Hz with precise, stable control.
Frequency Sweep
Glide smoothly between two frequencies, with custom ranges or presets.
Binaural Beats
Gentle stereo differences for focus, relaxation, meditation and sleep.
Healing & Solfeggio
A rich library of healing and solfeggio frequencies, ready to play.
Chakra Balancing
Tones aligned with the seven chakra energy centers.
Golden Ratio Mode
Harmonic sequences shaped by φ (1.618…) for smooth, natural flow.
Noise Colors
White, pink and brown noise plus calming soundscapes for sleep.
Cymatics Patterns
See each frequency form Chladni geometry as you play it.
Sequence Builder
Create step-by-step frequency sessions and schedule them.
Playlists
Save your favorite sequences and reuse them anytime.
See sound take shape
Cymatics & Chladni patterns
Sound isn't just heard — it has a geometry. Eunoia renders the standing-wave patterns a frequency would trace on a vibrating plate, in real time, right next to the tone you're playing.
Live cymatics preview · Solfeggio frequencies · patterns are illustrative of the in-app visualizer
Harmony by nature's proportion
Golden Ratio mode
Most tone tools step through frequencies in even, mechanical jumps. Golden Ratio mode spaces them by φ — the same proportion that shapes shells, petals and galaxies — so sequences feel smooth, harmonious and naturally resolved. Built to support calm, energy flow and a sense of balance.
Glide, don't jump
Frequency Sweep
Instead of holding a single tone, a sweep glides smoothly from one frequency to another. Choose your own start and end points or begin with a preset, then shape how the journey feels.
Start from a preset
Two tones, one rhythm
Binaural Beats
Play a slightly different frequency in each ear and your brain perceives a soft pulse at the difference between them — a binaural beat. Eunoia builds immersive binaural sessions from gentle stereo differences, designed to support focus, relaxation, meditation and restful sleep.
Illustrative · the beat is the difference between the two ears · waves scaled for display
Color your silence
Noise colors for sleep & focus
White noise
Even across every frequency — a steady wall of sound to mask distraction.
Pink noise
Softer in the highs, gentler on the ear — a favourite for deeper sleep.
Brown noise
Deep and rumbling, like distant rain — grounding for focus and calm.
Made for moments like these
One app, many rituals
Beyond your phone
Connect your devices
Eunoia pairs with companion hardware for a deeper, hands-on practice.
Harmonize with Aplicum devices
Connect your Aplicum device to extend Eunoia's sessions into guided energetic balancing and support — controlled straight from the app.
NLS Box v2.0 integration
Pair an NLS Box v2.0 to run Non-Linear System scans and enable remote energetic harmonization within your routine.
From the community
Quiet minds, kind words
"A wonderful little tool. The cymatics view makes frequencies finally click for me."
"Golden Ratio sequences are my evening wind-down now. Nothing else sounds quite like it."
"Brown noise plus a sleep sequence and I'm out. Simple, beautiful, does the job."
Start your sound journey
Bring Eunoia with you
Free to start, with premium tools when you're ready to go deeper. Available on iPhone and Android.
Good to know
Questions, answered
They're a set of specific tones long used in sound and meditation practices, each associated with a different intention — calm, release, balance. Eunoia gives you a ready library plus the freedom to generate any frequency yourself.
Instead of stepping through frequencies evenly, Golden Ratio mode spaces them by φ (1.618…), the proportion found throughout nature. The result is sequences that feel smooth and harmonious rather than mechanical.
White, pink and brown noise are different "shapes" of broadband sound. White is even and bright, pink is softer, brown is deep and rumbling. Each is great for masking distraction, focusing, or drifting off to sleep.
Cymatics is the study of how sound forms visible patterns. Eunoia shows the Chladni-style geometry a frequency would create on a vibrating plate, updating live as you change the tone or waveform.
Not at all — the full frequency toolkit, visualizer and noise colors work on your phone alone. Aplicum Connect and NLS Box v2.0 support are optional extras for those with the companion devices.
Yes — you can use core frequencies, waveforms, chakras and saved sequences for free. Advanced tools are available through in-app purchases that keep development going and the free features ad-free.