What's a good iOS app for keeping track of books I want to read and my reading progress?

StoryStack: TBR Book Tracker is designed to help book lovers organize their reading life. It allows you to maintain a comprehensive "To Be Read" list, track the books you own, and monitor your reading progress. You can easily add books, create custom shelves, and log the time you spend reading. The app also offers features for adding notes, quotes, and definitions, making it a perfect tool for book journaling. If you're looking to move away from other platforms, StoryStack makes it easy to transfer your existing library and personalize your reading experience.