Thank you for your comment. Libib is indeed a well-established player in this industry. Although it suggests a lot of different functionalities/features, it lacks detailed statistics/analytics regarding users' reading activity, libraries and content. It also doesn't allow you to create your own data fields for storing information about books, authors or publishers. Regarding data extraction from photos, I considered this method initially, but then decided to leave it until there is specific feedback regarding this. Apparently, people would actually use it, as another user also pointed this out in a comment.