Privacy

Effective July 29, 2026

Hydrophone collects nothing. No analytics, no tracking, no crash reporting, no accounts, no third-party services. This page exists to say so precisely.

What stays on your Mac

Your server address and credentials are stored in the macOS Keychain, protected by the system. Preferences (window layout, playback settings) and a cache of album artwork are stored locally in the app’s sandboxed container. None of this ever leaves your machine.

Where the app connects

Hydrophone talks to exactly one place: the music server you configure. Browsing, streaming, search, favorites, playlists, scrobbles, and the saved play queue are all requests to that server, authenticated with your credentials as the OpenSubsonic protocol specifies. What your server logs or stores is governed by whoever runs it — usually you.

If you use the demo server button, the app connects to the public Navidrome demo at demo.navidrome.org with its published demo account instead. Nothing about you is sent beyond the standard requests any Subsonic client makes.

This website

hydrophone.app is a static page hosted on GitHub Pages. It sets no cookies and runs no analytics. GitHub may keep standard server logs of requests; see GitHub’s privacy statement.

Changes and contact

If a future version ever changes any of the above, this page and the release notes will say so plainly. Questions: open an issue on GitHub.