Privacy Policy
Last updated: February 2026
Analytics
This site uses Datafast for anonymous analytics. Datafast collects aggregated, privacy-friendly usage data — page views, referrers, and device types. No personally identifiable information (PII) is collected. No cookies are set by this web app.
Third-Party Data
Spectrogram images are loaded directly from an external sensor provider (sos70.ru). Your browser makes a request to that server when spectrograms are displayed. Their privacy policy governs that interaction.
No Accounts or PII
This web app does not require registration. We do not collect names, email addresses, or any other personal data. Schumann resonance readings are sourced from public ELF sensor data — no user data is involved in their generation.
Contact
Questions about this privacy policy? Reach out via the App Store listing developer contact.