App started out good. I turned to it because iBooks doesnt allow highlighting on PDFs. However, after a few weeks of infrequent use it has started crashing. It would crash the first time of opening, I would have to kill the app and restart it and then it would work fine. Now its gotten to the point that it wont open at all or if it does it freezes and crashes immediately. Dont bother with the app unless it gets fixed, appears to not have been updated since April