Privacy Policy - Your Audio Data Stays Private & Local
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This policy explains the separate treatment of microphone data, local measurement data, advertising, and automatically loaded website analytics.
What We Access
Microphone audio is analyzed in your browser only. We do not create audio recordings or upload audio, live readings, calibration values, saved history, exported files, email addresses, or free-text content to advertising or analytics services.
Advertising Partners
We use Google AdSense as our only advertising service. Google may use cookies, web beacons, IP addresses, device data, and identifiers to deliver, measure, prevent fraud in, and where permitted personalize ads. In the EEA, United Kingdom, and Switzerland, Google CMP choices control advertising consent; denied or absent consent keeps personalized-ad signals denied.
Analytics and Performance
Google Analytics 4 (measurement ID G-BTPD1Y7KP9) and our self-hosted Umami instance load automatically on every visit without waiting for an analytics consent signal. They may process page URLs, referrers, timestamps, browser or device details, IP-derived network information, and cookie or session identifiers. We do not send audio, readings, calibration, history, email, or free text. GA4 is configured without User-ID, Google Signals, ad personalization, or remarketing audiences.
Local Storage Only
Calibration offsets and measurement history are stored in browser localStorage on your device. They are not synchronized to our servers. You can remove them with the tool's clear controls or by clearing this site's browser data.
Service Providers and Ordinary Site Data
Google Analytics 4 and our self-hosted Umami instance load automatically on every visit and may receive ordinary web data such as IP address, browser and device information, page URL, referrer, timestamps, and cookie or session identifiers. Google AdSense may receive advertising data according to the applicable advertising consent signal. We do not sell microphone audio or measurement data.
Browser Security
Modern browsers protect your privacy by requiring explicit permission for microphone access. You can revoke this permission anytime through your browser settings. The Web Audio API we use is designed with privacy in mind—it processes audio without creating recordings.
Your Choices and Retention
Once published, Google's consent message will let you manage advertising choices. GA4 and Umami currently load automatically; you can restrict them with browser privacy controls, content blockers, or cookie deletion. You can also revoke microphone access and clear local measurement data. We do not provide user accounts.
Questions?
If you have concerns about privacy or how this tool works, contact us at [email protected]. We're happy to explain our approach in more detail.