MediaMonkey for Android has been updated to build 142. The new build has a lot of bug fixes in it with things like library folder fixes, UPnP crashes aren Wi-Fi syncing issues. The app is great for managing large music libraries and it has lots of syncing options with the desktop versions.
The app is free from the Google Play Store.
Fixed library folder settings are lost (library disappears)
Fixed using playlists can trigger a crash
Fixed Now Playing may fail to refresh
Fixed metadata display over bluetooth (partial)
Fixed album art cache fails to update on sync
Fixed handling of compilation albums
Fixed UPnP first track not displayed correctly
Fixed UPnP crashes when viewing video properties
Fixed Wi-Fi sync fails for complex autoplaylists
Fixed .nomedia file should be included with album art folder