Faster than Calc is a iPhone magic app released on Apple's app store.

Effect:
1. Spectator enter any formula into a native-looking Calculator (say 265 + 4126 -9854 +3542 + 2145 -9547 + 35 +74814 - 95412 ...)
2. Without pressing the enter, you instantly reveal the answer.

Conditions:
1. The calculator is legitimate
2. The magician never touches the calculator
3. Nothing to memorize
4. Spectator can inspect
5. Repeatable without reset
6. Of coz, no stooge

Link: http://itunes.apple.com/app/faster-than-......360?mt=8

Please kindly note that this app is developed by me. I have previously posted dozens of tricks in secret session and published some effects in magazines.

I recommend you this app because I have been very successful in using it to astonish people, and make them believe I have super mental skill.