1. It’s the only app for iPad and iPhone inside which you can directly buy ebooks and audiobooks.
2. The automatic theme switcher applies to book reader and library view.
Apple’s own book-reading app (previously called iBooks) rarely gets an update. It usually happens with the introduction of the new iOS. However, for anyone who is looking for an app that’s 100% integrated with the iOS and iPadOS, there is no better choice.
Apple Books is the only app for iPad and iPhone inside which you can directly buy ebooks and audiobooks. Book reading apps from other ebook platforms don’t offer this quite obvious feature because Apple gets a huge fee from all in-app purchases.
The latest major update of Apple Books features a quick start Reading Now section, better library management, and automatic night theme.

Reading Now home screen includes books that the user might consider buying. Under the books that you’ve purchased, you will see titles that you’ve added to your wish list. Swipe down, and you will see recommendations from Apple ebook store in a few popular categories.
The bookstore has a dedicated section. The homepage includes lists of trending books, plus top charts in paid and free categories. When you tap the menu icon in the top right corner, you will also access trending titles in most popular genres.
The biggest benefit, however, is the automatic theme switcher. It’s something other book readers still don’t offer for iOS. What’s important, the dark theme is applied not only to the book-reading interface but also the library view.
Benefits: Easy to use, built-in bookstore, automatic night theme.
Compatibility: iPad, iPhone.
Price: Free.