IPhone game where you make words out of letters?

What is the iphone game where there's a bunch a letters all over the screen and
you have to try and make as many words out of the letters as possible? You play against
someone. It's timed and it sees who can make the most words in the set amount of time, and
whoever makes the most words wins that match

any idea?

Its probably scramble with friends or whatever that is on the app store. Or words with friends?