Probably the best crossword app I haven't tried the paid version  but the free version works great. You get a handful of puzzles a day at various levels of difficultly. My one issue is that when they load some of the classic puzzles it doesn't store correctly whether you have finished them in the past. The affect of which being that you start doing a puzzle and figure out ten minutes in that you are magically getting the answers too easily. I just stopped doing the classic puzzles. It's free though  can't complain.
March 08 2014