Is there any kind of math 'words with friends' game for the ipod touch?

When I was little I had this awesome game called Smath, and it was like scrabble but with math equations. I know that sounds really geeky, but my dad is a math person so when I was little he loved playing it. anyways, a few weeks ago my friend told me she found something on the apple store that was like math 'words with friends' and it reminded me of Smath. So i have been looking on the apple store for it but I can't seem to find it. does anyone know of this game? if they do, please tell me the name! I am dying to play!