WIZARD LIVE Android App
And you can play against live players
Are you aware that there is an excellent Android app called "Wizard Live"? It has a great A.I. system which you will find quite challenging. You can download the app for free and play complete games. If you like it, and you will, a small fee gives you some extra goodies.

Go to: https://play.google.com/store/apps/details?id=com.qsoft.android.wizard&hl=en