NucubeWindows and Android
“I use MediaMonkey for a Windows collection synced to Android, and I want that library on Linux, macOS, and iPhone and iPad too.”
The same library app on Linux, macOS, and iPhone and iPad
Nucube is one library on Linux, macOS, Windows, Android, and iOS — iPhone and iPad included. Sync is metadata from desktop to mobile; download is a separate step that copies chosen audio onto the device, and the originals stay where they are.
Stay with MediaMonkey if a Windows collection synced to Android is the point
MediaMonkey manages a Windows collection and syncs it to Android. The apps are free. Windows Gold and Android Pro are one-time licenses for extras. Their sync can copy files. Try Nucube if you also want the same library app on Linux, macOS, and iPhone and iPad.