1. Kobo Books

Kobo Books is ideal for users who frequently read ePub on Android for free. This Android EPUB reader allows you to access and listen to over 6 million titles of ebooks and audiobooks. It also supports EPUB2, EPUB3, FlePub, MOBI, and ePub3AV audio or video books. The app offers customizable reading modes, such as Light and Dark Mode.

Best for:

• Select a word to see its definition instantly;
• The best EPUB reader for Android is free to use and lets you organize and group your books by author, series, or other way you want;
• Take notes and highlight text;
• It also comes with an iOS app that allows viewing PDFs.

2. Moon+

A long-time book nerd will recommend Moon+, an EPUB reader with a dictionary feature on Android. Thanks to its wide file format compatibility, it is the best ebook reader for Android. The app allows free access to thousands of ebooks and online libraries. Highlighting and annotating are the basic functions. The downside is that properly displaying math or tables is impossible.  

Best for:

• The best EPUB reader for Android can read many other book formats, including PDF, AZW3, MOBI, DJVU, CBZ, CBR, DOCX, ODT, RTF, etc.;
• The page flip animation, real page-turning, and auto-scroll options;
• A variety of visual options such as themes to comfort your readers;
• Press a word or phrase to get the translation.

3. FBReader

If you wish to read an EPUB file on Android conveniently, take the FBReader for a spin. Standing out as the best Android EPUB reader, the app is available for offline reading and library syncing. It lets you view not only EPUB but also PDF, Kindle azw3 (mobipocket), and even CBZ/CBR comic books, and other documents.

Best for:

• It is the best free EPUB reader for Android, which can open DRM-free ebooks and books protected by Readium LCP;  
• Integration with dictionary from even outside for word meaning explain;
• Highly customizability that enables you to use TrueType/OpenType fonts and custom reading backgrounds;
• With a connection to network ebook resources.

4. eBoox

eBoox is your another Go. With ten million downloads and a 4.8 rating in the Google Play store. The Android best EPUB reader can also read lots of file types, such as FB2, PDF, DOC, ODT, HTML, ZIP, and RAR archives. It is free and ad-free, allowing users to sync books or files across Android devices.

Best for:

• Load and import books from your local phone file folders, the cloud, memory cards, and browsers into the app;
• The EPUB reader on Android has built-in book libraries for you to find and download your favorite ones;
• User-friendly interface design.

5. Librera Reader

If you prefer a FOSS open-source EPUB reader for Android, expand the power of Librera. Installable from F-Droid, the app can read PDF, DjVu, TXT, AZW, AZW3, CBR, and some more ebooks. It features the auto-scroll and hands-free Musician's mode but lacks Google Play services and Drive synchronization. It has bookmarking and note-taking features and provides offline dictionaries.

Best for:

• The Android good EPUB reader voted up on Reddit is designed with text to speech engine to read books out loud;
• Capable of reading right-to-left languages such as Thai, Arabic, etc.;
• An online version of the EPUB and CBR reader for Android is running in web browsers.

6. Google Play Books

Google Play Books is a perfect choice for those tied into the Google ecosystem. It integrates with other Google services and can sync your reading on different devices. It’s liked for the ability to read EPUB books on Android offline and play audio files. Despite the cluttered interface, and the weakness in book page printing, it is still a nice EPUB viewer for Android.

Best for:

• A large collection of manga, ebooks, audiobooks, and comics categorized by best sellers, genres, business titles, and more;
• There are free ebooks to read and download.

7. ReadEra

ReadEra is also hands-down one of the best EPUB and PDF readers for Android, and it's often mentioned on Reddit. The app opens ePub files and all the other supported books without ads or registration on Android. It works offline for free without limitations. It’s praised for easy navigation through a book and multiple reading settings.

Best for:

• A handy book manager and organizer for your library;
• It allows users to quickly locate a book by To Read, Have Read, and Favorites lists;
• Read two books even in two formats at the same time with the split-screen mode.

8. Lithium

Lithium is a simple and lightweight EPUB file reader for Android. Like its competitors, it can remember where you left off and add highlights, bookmarks, and notes to your book. You can sync these across your devices with the cloud, Google Drive. What’s disappointing sometimes is that turning the pages can make the sentences vanish. Only EPUB, but no other formats, is supported.

Best for:

• Auto-detection of books and documents;
• No ads in the app.

How to Convert EPUB to PDF to Read on Any Device

Using the above-listed Android apps to read EPUB books and files is fine, but why not convert the books to PDF? PDF is more universal and enjoys a higher compatibility with nearly any software and device. You will have an improved reading experience since you can do all the same with the PDF versions you read in EPUB. SwifDoo PDF is one of the best EPUB to PDF converter software for easing your life. Open the converter, import your EPUB file, and click Start. 

Like an EPUB book reader for Android, it lets you:

• convert EPUB books to PDFs in batches;
• add sticky notes, line markups, highlights, bookmarks and text;
• select text to translate into another language without delay;
• change the font size and reading theme to view in dark or light;
• directly drop an EPUB file to the software to open and view.

SwifDoo PDF for Android can reflow text so users can view the content on the screen comfortably.

Conclusion

With tons of tools on the market today, knowing what you pay attention to is important. Think about whether all you want is a free or paid but affordable app. Ask yourself if you have books in multiple file extensions to read, what features to include—such as the word query or translation—and whether you need configurable reading options. You can also decide on the right fit from performance or flexible book management.