This app is a plugin. Prior to use it you should have
https://f-droid.org/packages/ch.blinkenlights.android.vanilla installed. Once both player and this plugin
are installed, request a context menu from library screen, select "Plugins" and
"Metadata fetch" afterwards. Note that this plugin requires internet connection
to be useful.

This plugin can create fingerprint for any music file you wish to know about and
request its metadata from AcoustID, libre and open source
fingerprinting service. If