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Privacy Policy

Resonance Meter · Developer: GF43 · Effective September 26, 2026

This policy explains how Resonance Meter handles information when analyzing your singing voice and measuring room noise. The app does not require an account.

Microphone access and audio data

The app accesses the microphone only when you actively start a voice or room-noise measurement. Audio is processed on your device to calculate acoustic features and display results. During a measurement, the app may create a temporary audio file on the device; that file is deleted after analysis is complete.

GF43 does not receive, transmit to a server, sell, or share your recordings or measurement results. Production releases do not retain diagnostic recordings.

Data stored on your device

The app stores only your language choice and first-launch completion status locally. A room-noise measurement is held temporarily in memory, expires within 10 minutes, and is not retained after the app restarts. You can remove stored data by clearing app data or uninstalling the app.

Third-party services

The app does not use advertising, behavioral analytics, cloud accounts, or third-party audio storage. It does not use network access to transmit audio or measurement results.

Device permissions

Microphone permission is required for the app's core measurement features. The app may also use audio-settings permission to configure a recording session. You can revoke microphone permission in your device settings; microphone-based measurements will then be unavailable.

Children

The app is not directed to children under 13 and does not knowingly collect personal information from children.

Security and retention

Settings data is kept in the app's private storage area. Temporary audio is deleted after a measurement finishes, and room-noise results are not retained long term.

Policy changes

We may update this policy when functionality or legal requirements change. The new version and effective date will be posted at this URL.

Contact

Privacy questions: gf-43@googlegroups.com.