There is no spotify integration at the moment, but that is certainly on my list of things to do. The thing holding me back is the lack of a good API for C# UWP applications. I'm going to have to find something that works for the Windows 10 version as I don't want to support Spotify on just Android (as it would make the library synchronization and sharing a problem). I'm going to experiment with this https://github.com/JohnnyCrazy/SpotifyAPI-NET to see if I can find a way to play audio from MobileSheets (which may involve having the spotify app running in the background to actually play the music).
Mike
Mike