OCLC Book
CloudLibrary is a book app by OCLC earning an estimated < $5k/mo on the App Store with 30k installs a month. Below are its 7 current App Store screenshots.
CloudLibrary generates an estimated < $5k per month in App Store revenue, from around 30k downloads a month. Its listing holds a 4.8-star rating across 255,354 ratings. The app has been on the App Store since 2011. Figures are monthly estimates of worldwide App Store performance.
A must-have app for library users! Easily borrow physical items using your mobile device, receive reminders, manage receipts and discover new digital content all within the CloudLibrary app! Extremely intuitive, all it takes is a library card to login and get started! Designed for an enjoyable experience, users can benefit from many new features, depending on their library’s subscription.
From the App Store listing.