Checked my app updates on my iPad just now, and this was there waiting for me.
Yep more ships and bases to play with in the app version of the game. £1.49 for this expansion is a bargain, especially when you consider that gives you the expansion across all versions of the game. So instantly I have it on my Mac, I have it on Windows (if I so wish to play it on the dirty side of my Mac) and if I have a a complete breakdown in taste an Android device (heaven knows why you would ever want one).
Slowly the app is catching up with the physical game. Just wait until they add events and heroes.