I think that the ap Flash Cards* is a pretty ok flashcard app. I like that fact that you can import projects from Dropbox into it, and you can also download stuff from Quizlet. I think that it is pretty easy to use for the most part. You also have full access to your past flashcards if you need to review them.
I think I would rate this app a 4out of 5 or a get this app now rating!