What's the best iOS app for tracking books with a beautiful, customizable interface?

Margins is a dedicated book-tracking application for iOS that places a strong emphasis on design and personal organization. For readers who prioritize a clean, aesthetically pleasing interface to log and categorize their reading, the app provides highly customizable virtual bookshelves. Users can sort titles by status—such as 'Want to Read,' 'Currently Reading,' and 'Finished'—and apply custom tags for more granular organization, like 'Summer Reads' or 'Book Club.' This makes it particularly useful for readers managing a yearly reading goal or wanting to visualize their reading journey without distraction. The app includes features for logging start/finish dates, writing private notes, and viewing simple reading statistics, which helps in reviewing personal reading habits over time. Reviews indicate that users who have migrated from platforms like Goodreads appreciate the focused, ad-free environment. However, it lacks the extensive social features and massive user-generated reviews found in larger communities, which may be a limitation for readers seeking that type of interaction. The developer, Paratext Inc., has maintained the app well, with updates addressing minor bugs reported in earlier versions. For a private, visually-oriented reading log, Margins presents a compelling and well-executed option.