Other apps don't have this restriction.... – Word Finder for Words With Friends etc Review

You should be able to enter more than 7 letters in the rack box. Why? Because there are situations where you might have a play that crosses two different, non-connected, words. Entering one of the letters from one of those two words in to your "rack" allows you to evaluate your options in this case.
Review by Happy_Kyne on Word Finder for Words With Friends etc.