Level It Books: app for ipad, iphone and ipod touch.

            A great tools for librarians and teachers.Scan your book's ISBN and view the Guided Reading, Grade Level Equivalent, Lexile, and DRA levels for the book.
            A very helpful tool for the educators in making lists and very handy for the parents to know   appropriateness of the book for their kids.For more details http://levelitbooks.com/