I've used this app for awhile and I have a large number of books. Mostly its fine  but they do not respond to emails when there is an issue. Even after following directions exactly when switching phones  my books were there but the covers are missing. I have nearly 1000 books so I'm not about to scan them again. If they were even a tiny bit responsive  they'd get a 5 star review  but I've emailed 3 times with NO RESPONSE.
May 12 2016