App is great just need a few improvements. I would suggest unlocking the entirety of the app for the $0.99 fee, rather than only unlocking individual difficulty levels. Also, in some of the problems generated the folds seem to be going into the screen. This shouldn't be the case as all the Hole Punch questions on the DAT will have paper folds made out of the screen (toward the test taker). It should only be a matter of time for this to be resolved which is why I recommend this app.