The app Classical does not collect or use any personal or private information on your device which could be used to identify individual users.
This application has integrated Microsoft App Center SDK. The analytics and diagnostics services are used. For information about the general data collected see https://docs.microsoft.com/en-gb/appcenter/sdk/data-collected. Classical logs custom events to help track where works return no recordings, which works and composers are viewed, playlists viewed and where deep links are tapped. This data is used by Apps On The Move to improve Classical and inform marketing of Classical. The data held in App Center is not shared by Apps On The Move with any other third parties.
Apple Music details are kept only on your device and never shared with any third-party services.