Effective date: April 8, 2026
Beltr is a desktop application that runs entirely on your device. We are committed to your privacy and collect as little data as possible.
All vocal separation, lyrics synchronization, pitch detection, and scoring happen locally on your computer. No audio data is sent to any external server.
When guests connect their phones as remotes, all communication happens over your local network via WebSocket. No data leaves your local network.
When activating a license key, the app contacts LemonSqueezy's payment API to validate your key. Only the license key and a device identifier are transmitted. No usage data, audio data, or personal information is sent during this process.
When lyrics fetching is enabled (on by default), the app sends song title and artist name to LRCLIB, a public lyrics database, to retrieve synced lyrics. No other data is transmitted. This feature can be disabled in settings.
The Beltr website (beltr.app) uses Google Analytics to understand visitor traffic. The desktop application does not include any analytics or telemetry.
All application data — songs, separated stems, lyrics, session database — is stored locally in your chosen data directory. Nothing is backed up, synced, or transmitted externally.
We may update this policy from time to time. Changes will be posted on this page with an updated effective date.
For privacy questions, contact support@beltr.app.