iMagicCrystal is the ultimate application to generate exciting fun with your family, friends and others. You will be recognised as a magic mentalist by having an iPhone that knows a secret sign that is in the mind of other persons only. It's great fun for every owner of an iPhone or iPod touch.

Pick a number between 10 and 99. Subtract the sum of the two digits from your number and remember the result. (For number 45, you add 4 + 5 = 9 and substract this from 45. The result you remember is 36 = 45 - 9). Find your number on the next screen and remember the corresponding symbol which eventually will be guessed by your iPhone.