Number Mental (by Damien White) is a fantastic mental magic trick on your iPhone.
With this little App, you can easily find out a freely chosen number between 0-63. With the secret design, the spectator will never find out, what is the secret!
This App is more than an App! Its learn You, how can you create this mental trick at home from paper, so you can show it anytime, anywhere! Show the iPhone trick first! Then show the same trick with papers!
So the spectators will think that You are a real mentalism, because you can show this trick without your iPhone!
Good practise!