This app takes English input and translates it to Circular Gallifreyan. You can then share the converted text with others as well as export it to a generic image file. A great app for all Doctor Who fans.
Circular Gallifreyan contains some letters with lines extending from them. These lines point in random directions which will change every time the letter is redrawn (which includes when you rotate the screen). The lines are supposed to move around. Only the number of lines is important to the translation.