Resonance is a native soundscape and binaural beat console for sleep, focus, and lucid dreaming — built from the ground up for Android, not a wrapped website.

Binaural Core — the heart of the app. Three independently tunable brainwave layers (Delta, Theta, Alpha), each with its own carrier and beat frequency, a live waveform monitor, and five carrier-tuning presets from gentle octave spacing to a fully custom "God Mode." Layer them together for a program that shifts with you through the night.

Isochronic Tones — a pulsing single-tone entrainment layer with fully live-tunable carrier and beat frequency. No headphones required — unlike binaural beats, isochronic tones work through speakers too.

Twelve hand-built sound engines, each synthesized in real time, not looped samples:
- Ocean — filtered surge and swell, with deep rumble timed to the wave
- Rain — soft, steady, breathing rainfall
- Rain on a Tin Roof — the same rain plus real struck-metal resonance
- Thunder — distant, rolling
- Wind — sweeping through trees, with a whistling high edge
- Fire — a quiet crackling hearth with the occasional loud snap
- Crickets — a real chorus of individually chirping voices, not a loop
- Brook — bubbling water with granular texture
- Resonant Tuning — ring-modulated chant tones
- Drift — a slow interaural time-shift, research-backed for deep relaxation
- Pink Noise — smooth, balanced static for quick focus or masking
- Brown Noise — deep, rumbling low end, heavier than pink

Session Sequencer — build a timed program that eases you down through the layers and back up, step by step, for a real wind-down-to-wake arc instead of one static tone all night.

Sleep Timer — quick-set 15/30/45/60-minute countdown that fades your session out smoothly instead of running all night.

Wake Alarm + Dream Log — set a wake time and the app fades you up through alpha with an alerting tone, even with your phone locked. Hit Sleep Now to ease back down — it also grabs a 30-second voice note so you can capture a dream before it fades.

XY Oscilloscope — a live Lissajous vectorscope with color-coded, phosphor-trailed traces for six engines at once. Watch your session's actual waveform geometry shift in real time.

9 built-in presets plus 6 slots to save your own — long-press any sound to grab exactly what's playing.

Everything runs on Android's native audio engine for real background playback — no browser tab to keep alive, no ads interrupting your session.

Binaural Core, Ocean, Rain, Pink Noise, Brown Noise, and 3 presets are free forever. The rest — including Isochronic Tones and the XY Oscilloscope — unlock with a one-time purchase, no subscription.