1. eBoox

Price: Free / In-app purchases ($0.49–$4.99 per item)

eBoox offers an ad-free reading experience with support for multiple formats like FB2, EPUB, and PDF. It syncs across devices and provides fast page loading, a clean UI, and access to books from your phone, SD card, or cloud. However, it lacks an in-built dictionary and local backup, which are features users might look forward to in future updates.

2. AIReader

Price: Free

AIReader is notable for supporting older Android versions and a wide range of formats, including EPUB (no DRM), RTF, and MOBI. It features customizable themes, auto-scrolling, and page-turning animations for a smooth reading experience. It’s entirely free, with optional donation versions to support the developers.

3. Amazon Kindle

Price: Free / In-app purchases ($1.99–$11.99 per item)

The Amazon Kindle app is backed by one of the largest e-book stores. It offers cross-device syncing, free e-books, and offline reading. While the app interface contains ads, the reading experience is ad-free. It provides robust customization options, making it an excellent choice for book lovers.

4. Barnes & Noble Nook

Price: Free

Nook is a solid competitor to Kindle and Kobo, supporting a wide range of formats, including magazines and comics. It offers customizable themes, cross-device syncing, and a seamless connection to Barnes & Noble’s online and physical bookstores.

5. Lithium

Price: Free / Pro version ($1.99)

Lithium is an EPUB reader with a clean, ad-free interface. It automatically detects your books and offers highlighting, note-taking, and day/night themes. The Pro version adds syncing, more highlighting colors, and theme customization. Although it occasionally has bugs, it’s a reliable option for casual readers.

6. Librera Reader

Price: Free

Librera Reader supports a variety of formats like PDF, EPUB, and MOBI and includes a text-to-speech feature. It also offers library organization, note-taking, and customization for an enhanced reading experience. Special modes for musicians and language learners set it apart. The UI occasionally malfunctions, but ongoing updates aim to improve stability.

7. Kobo Books

Price: Free / In-app purchases ($0.05–$400 per item)

Kobo Books integrates seamlessly with its online bookstore, supporting both e-books and audiobooks. Features include cross-device syncing, offline downloads, and a Night Mode for reading in low light. It’s a straightforward app with decent discovery tools, though primarily tailored for users invested in the Kobo ecosystem.

8. Moon+ Reader

Price: Free / Pro version ($8.99)

Moon+ Reader is a versatile app supporting various formats like EPUB, PDF, MOBI, and comic book formats. It includes OPDS support, over ten themes, gesture controls, and Dropbox syncing. The Pro version removes ads and adds more features, making it a premium choice for avid readers.

These apps cater to a wide range of readers, from casual book lovers to those with specialized needs, offering a mix of simplicity, format versatility, and advanced features.