There's a whole host of medical journals out there to explore, libraries full of books, and classrooms with teachers. The only Apps you should use are reference and terminology cheat sheets. You'll have to actually know the stuff in medicine for obvious reasons, so learn some memory techniques and learning how to learn is a good start. A MBP full of movies and music is not at all helpful, even if it is 4 seasons of Greys Anatomy and Patch Adams.