Paid version is mostly very good
I had to upgrade to the paid version soon after I started using it. I noted a number of errors in the database and you can make no edits to any selected book using the free version.
Otherwise its very good. I did quit using the "Mass Add" feature since it was too time consuming to then go back and check each book to ensure no problems. So I just add books one at a time which works well.
Newomahaguy about
iCollect Books, v6.1