Ratings & Reviews performance provides an overview of what users think of your app. Here are the key metrics to help you identify how your app is rated by users and how successful is your review management strategy.
1 over 2 million books from public domain book catalog such as Gutenberg, Feedbooks, Internet Archive, Baen Books, Smashwords. 2 you can open books in iBooks、Kindle and many other ebook reader apps you like. 3 add custom book catalog 4 search and download books from websites by the search engine you like. Note: All books are public domain books, so it is legal.