Grounded in what we can say.
Sanctuary's defaults are practical and evidence-aware. The eye-break cadence, breath pacing, and sound options are referenced openly, with limits stated plainly.
Four anchors.
The 20-20-60 reset.
Sanctuary's eye-break cadence keeps the memorable twenty-minute, twenty-foot structure and extends the rest window to a guided minute.
Slow breath, paced gently.
Paced-breathing research often studies slow rates near 5-6 breaths per minute. Sanctuary uses a brief, comfortable breathing window as a transition cue, not as a health guarantee.
Binaural beats and theta.
Sanctuary's optional 250 Hz / 4 Hz theta binaural pairing draws on a body of work on auditory entrainment and attention. Effects are individual and additive rather than primary — included as an option, not a claim.
Spectral floor, stable attention.
Pink noise (1/f spectrum) is associated with steadier-state attention than silence or white noise in some studies. Sanctuary's optional pink noise generator runs in an AudioWorklet for low overhead.
What we measure, and don't.
Your sessions belong to you.
We keep session metadata — start/end timestamps, your tier, and the settings you've changed — plus anonymous product analytics. We do not log audio, microphone input, or screen content; audio is generated on your device. You can delete your account from Settings, and Elite members can download a JSON export of stored account data.
Defaults you can trust.
Every cue in Sanctuary has a practical reason and a clear limit. Try the loop, or read the policy that governs your data.