IPhone NCLEX apps-any good ones?

I would appreciate any feedback! ANy good apps for NCLEX or nursing in general?
Yes, Mosby's has several "NCLEX-RN Review" apps that are great! They have the following:- Medical-Surgical- Mental Health- Women's Health- Pediatrics

I used the Saunders Q&A app for my iPod touch. It's got customizable quizzes, 50 questions at a time, and once the quiz is over you can go back and read rationales for all the questions. I loved how portable it is

I really found the ATI one to be closest to the NCLEX of the Saunders/Mosby/ATI ones that I downloaded.

I use the ATI RN-Mentor... it was $20. I think its good for the price.