Many mobile apps treat every tap, playback event, and session duration as data to be collected and sent to a remote server. While telemetry gives developers a quick dashboard, it adds startup overhead, wakes the network radio, and turns personal listening habits into a user profile.
When I built Levyra, I started from the opposite rule: keep every piece of personal data on the device and ship zero telemetry SDKs.
Everything starts at the database layer. Instead of syncing state to a cloud backend, Levyra stores playback history, playlists, search cache, and preferences in an on-device Room SQLite database. With proper indexes and IO coroutine dispatchers, local queries finish in under a millisecond and work offline.
Network requests only happen when you search, stream audio, fetch lyrics, or check for updates, connecting directly over TLS 1.3 without analytics proxies or fingerprinting headers. Independent static APK analysis on Apptizo confirms 0 trackers, 0 ad SDKs, and only 5 standard Android permissions.
Shipping without remote crash trackers forces you to write careful error handling and give users a clean local diagnostic log they can inspect and share on GitHub if something goes wrong.
