Shift any of your playlists on Apple Music or Spotify to another playlist on Apple Music or Spotify. No subscription required! No songs will be removed from playlists, only new songs will be added to playlists ensuring that you dont have duplicate songs in your playlists. Playlist shifts only take a few minutes with a clean, easy to use interface.
Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/