This app is the best out there. But then I could be biased.
If you are a mentalist or a magician, think about this. The spectator can choose any card he wants. The magician (You) or the spectator clicks on Reveal and the chosen card is shown. This can be used as Any Card at Any Number as well.
Truly any card be revealed and there is only one screen. You start the app before performing the trick. The spectator can watch you at all times.
No there are no secret screens used here.
The magician can actually have the spectator click on the Reveal button.
This is not your grandfather's Any Card trick. This is the real deal!
Also check out IspinthebottleApp at http://itunes.apple.com/us/app/ispinthebottleappplus/id484313073?ls=1&mt=8
IESP Mindread at http://itunes.apple.com/us/app/iesp-mindread/id483968035?ls=1&mt=8
ICompass Plus at http://itunes.apple.com/us/app/icompass-plus/id483287563?ls=1&mt=8