Good but still buggy I have so many books that this is perfect for what I need but the last so many months  when I scan or input the ISBN number  it gets hung up sometimes for quite a while. If I cancel  it gets hung up and I have to turn off my phone to stop the app. It still takes some time after I type in the author and title but not as bad as when I do it the other way. I would give this 5 stars if it would add books faster and not get hung up while searching or when I cancel the search. BTW: my app is up to date.