Apps similar to KOReader include calibre, which is free and open source. Other options are Okular, Readest, PDFgear and Koodo Reader. You're spoiled for choice with Ebook Readers like KOReader: we list more than 50 alternatives for Android, Windows, Linux, Mac and iPhone.
Free e-book manager with features including library management, format conversion, syncing to devices, internet-independent operation, built-in viewer, news download as e-books, text-to-speech, privacy focus, extensible plugins, and no registration or tracking.
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Multi-platform document viewer supporting PDF, ePub, comics, images, and Markdown with annotation, digital signature verification, tabbed interface, sidebar navigation, text selection, text-to-speech, magnifier, search, dark mode, and plugin support.
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Readest is a modern, open-source ebook reader for Windows, macOS, Linux, iOS, Android, and the web.
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Read, edit, convert, merge, and sign PDF files across devices, for completely free and without signing up.
Singapore
Koodo Reader is a powerful ebook reader designed to provide a simple and easy-to-use reading experience.
China
Librera Reader is a highly customizable and feature-rich application for reading books in PDF, EPUB, MOBI, DjVu, FB2, TXT, RTF, AZW, AZW3, HTML, CBZ, CBR formats on Android devices.
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MuPDF offers a highly versatile PDF, XPS, and eBook interpreter, customizable as a renderer, viewer, or toolkit. Features include digital signatures, redactions, form filling, annotations, and page manipulation, ideal for mobile, eBooks, and embedded apps supporting Java, C++, and Python.
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The Kindle app puts millions of books, magazines, newspapers, comics, and manga at your fingertips.
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Material3 eBook reader - Book's Story. Built with Jetpack Compose. Free & Open Source & Ad Free. 4 supported file formats (.txt, .pdf, .epub, .fb2), 2 supported languages. Lots of customization.
Openlib is an open source app to download and read books from shadow library (Anna’s Archive). The App Has Built In Reader to Read Books.
Read book files in EPUB, PDF, DOC, DOCX, RTF, TXT, DJVU, FB2, MOBI and CHM formats. Supports chapters, bookmarks, page style. Saves the current reading position. Automatic detection and display of the list of all supported documents on your device.
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