Literacy Leveler is normally a $4.99 app, but today (March 3rd) it is FREE! I found this gem thanks to Apps Gone Free.
Literacy Levelers scans the ISBN code from the back of the book and provides the user with the Lexile Level, DRA, and GRL. You can search the scanned book to your library by clicking the plus sign on the upper right corner.
Why is this simple app awesome? Think Common Core!