KOReader
KOReader is an open source document viewer and ebook reader application designed for e-ink devices. It supports a variety of ebook formats and offers features like annotations, bookmarks, and dictionary lookups.
KOReader: Open Source Ebook Reader for E-Ink Devices
An open source document viewer and ebook reader application designed for e-ink devices, supporting various ebook formats with features like annotations, bookmarks, and dictionary lookups.
What is KOReader?
KOReader is an open source document viewer and ebook reader application originally created for Kindle e-readers. It has since expanded support to other e-ink devices such as Kobo, PocketBook, Onyx Boox, and Android tablets.
Some key features of KOReader include:
- Support for a wide variety of ebook formats including EPUB, MOBI, FB2, PDF, DjVu, CBZ, CBR, and more
- Annotations and bookmarks sync across devices
- Customizable reading experience with options for font, margin size, line spacing etc.
- Dictionary lookups, table of contents navigation, search
- Supports adding online OPDS catalogs to download more books directly in the app
- Designed specifically for e-ink screens to optimize refresh rates and eyestrain
As an open source ebook reader, KOReader is free to use and allows users full control to customize their reading experience. It offers advanced features tailored for power users while maintaining ease-of-use for casual readers.
KOReader Features
Features
- Supports a wide variety of ebook formats including EPUB, MOBI, PDF, DjVu, CBR, CBZ, etc.
- Customizable reading experience - fonts, margins, themes, etc.
- Annotations and bookmarks support
- Dictionary lookups
- Supports adding online OPDS catalogs
- Sync reading positions across devices
- Text-to-speech
- Wikipedia integration
- Supports adding custom online content sources
Pricing
- Open Source
Pros
Free and open source
Highly customizable
Active development and community support
Works well on e-ink devices
Cons
Limited format support on some platforms
Can be resource intensive on older/limited hardware
Lacks some features found in commercial e-reader apps
Official Links
Reviews & Ratings
Login to ReviewThe Best KOReader Alternatives
View all KOReader alternatives with detailed comparison →
Top News & Books and Ebook Readers and other similar apps like KOReader
Here are some alternatives to KOReader:
Suggest an alternative ❐
SumatraPDF
SumatraPDF is a free and open-source document viewer that supports many file formats. It was originally designed as a replacement for the Windows PDF reader while being much lighter, faster, and more customizable.Some key features of SumatraPDF include:Support for PDF, EPUB, MOBI, CHM, XPS, DjVu, CBZ, CBR file formatsMinimal design...
Moon+ Reader
Moon+ Reader is a popular ebook reading app developed for the Android platform. It supports a wide variety of ebook file formats including EPUB, MOBI, AZW, PDF, DjVu, and more. Some of the key features of Moon+ Reader include:Multiple theme options - Choose from a variety of color themes and...
ReadEra
ReadEra is a versatile ebook and PDF reader available on multiple platforms including Windows, macOS, Linux, iOS and Android. It supports a wide range of ebook formats such as EPUB, MOBI, DJVU, FB2, PDF, and others.Key features of ReadEra include:Annotations and highlights - Add notes, highlights, bookmarks to any ebook...
Amazon Kindle
The Amazon Kindle is a series of e-readers designed and marketed by Amazon. The Kindle devices allow users to browse, buy, download, and read e-books, newspapers, magazines and other digital media via wireless networking to the Kindle Store. The hardware platform, which Amazon subsidiaries develop and manufacture, consists of devices...
Okular
Okular is a feature-rich document viewer application designed for the KDE desktop environment on Linux operating systems. It can open and display a wide variety of document formats including PDF, EPUB, PostScript, DjVu, CHM, XPS, ODT, FictionBook, ComicBook, Plucker, and others.Some of the key features of Okular include:Smooth scrolling and...
Calibre
Calibre is a free and open-source e-book computer software application suite which runs on multiple platforms, allows users to manage e-book collections as well as create, edit, and read e-books. It supports a variety of e-book formats.Some key features of Calibre include:Library management for organizing e-books into custom categories and...
Apple Books
Apple Books (previously known as iBooks) is an ebook and audiobook reading and store application developed by Apple. It comes pre-installed on iOS and macOS devices and allows users to browse, purchase, download, and read books and audiobooks directly on their Apple devices.Some key features of Apple Books include:Access to...
EPUB Book Translator
EPUB Book Translator is a free, easy-to-use EPUB conversion software that allows you to convert your EPUB files into a variety of popular formats including MOBI, PDF, HTMLZ, TXT, PDB and more. It provides bulk conversion capabilities so you can convert multiple EPUB files at once.One of the best things...
Storyteller
Storyteller is an open-source tool for authoring and running business acceptance tests. It allows users to write their requirements and acceptance criteria in a simple, non-technical format that reads like plain English.With Storyteller, you write executable specifications, called 'stories', that describe the behavior your system needs to have. These plain-language...
EPUBReader
EPUBReader is a versatile, open-source ebook reader application capable of reading books in the EPUB file format on Windows, Mac, and Linux operating systems. Developed by a community of volunteers, EPUBReader focuses on providing an intuitive user interface for managing and reading digital book libraries.One of the highlights of EPUBReader...
Epubor Ultimate
Epubor Ultimate is a versatile ebook DRM removal and ebook conversion tool for Windows and Mac. It can remove DRM protection from Kindle (.azw, .azw3, .kf8, .kfx, .mobi, .pdr, .tpz, .azw1, .azw4, .prc, .topaz), Adobe (.pdf, .epub, .epub3), Nook (.epub, .epub3), Kobo (.kepub, .kepub.epub) and Google Play Books (.epub, .epub3)...
FBReader
FBReader is a free, open source ebook reader software available across platforms including Windows, Linux, Android and iOS. Originally developed for Linux, it has expanded over the years to support many major computing platforms.FBReader's key features include support for a wide variety of popular ebook formats including EPUB, MOBI, FB2,...
Epic!
Epic! is a leading digital library designed specifically for kids ages 12 and under. With over 35,000 high-quality books, audiobooks, videos and quizzes, Epic! fosters literacy and learning in a fun, safe and advertising-free environment.Epic! can be used by kids independently or together with parents and teachers. The ever-expanding library...
Kavita
Kavita is an open-source web application designed for managing and reading digital comic book libraries. It provides an intuitive interface for browsing, organizing, and accessing your comics from any device with a web browser.Some key features of Kavita include:Automatic processing and metadata retrieval for added comic files and foldersCustomizable library...
Koodo Reader
Koodo Reader is a popular multi-platform eBook reading app that allows users to easily read eBooks on their preferred device. It is available on Android, iOS, Windows, and macOS operating systems.Some key features of Koodo Reader include:Supports major eBook formats including EPUB, MOBI, and PDFAllows uploading eBooks from computer or...
Librera Reader
Librera Reader is a highly customizable, open source ebook reader application for Android devices. It is designed to provide an efficient reading experience and support for a wide variety of ebook formats.Some key features of Librera Reader include:Support for common ebook formats such as EPUB, MOBI, PDF, DjVu, FB2, CBR,...
Citadel Ebook Manager
Citadel Ebook Manager is an open-source application for organizing personal ebook libraries. It provides users with the ability to catalog, search, and manage their digital book collections with custom tags, ratings, covers, descriptions, and other metadata.Some key features of Citadel include:Adding ebooks by monitoring folders or importing previously downloaded ebooksTagging...
AlReaderX
AlReaderX is a feature-rich eBook reader software for Windows. It supports a wide range of popular eBook formats including EPUB, MOBI, AZW, PDF, FB2, CHM, CBR, CBZ, and more.Some of the key features of AlReaderX include:Modern and intuitive interface for easily managing and reading eBooksBuilt-in library management system to organize...
Bookari Ebook Reader
Bookari Ebook Reader is a versatile, multi-platform ebook reading application. As an open-source software, Bookari emphasizes flexibility, customization and user control over the reading experience.Bookari's intuitive interface allows for seamless library organization with support for books in EPUB, MOBI, PDF, DJVU, FB2, CHM and various other text and image formats....
Librum
Librum is an open source ebook library management application designed for managing personal ebook collections and integrating with popular e-reading devices and software. Developed using Python and PyQt, Librum provides an intuitive way to catalog, organize, and access your ebooks from a single user interface.With Librum, users can add books...
Openlib
Openlib is an open source software designed for building and managing digital libraries and archives. Developed by the Open Library Foundation, Openlib provides a flexible framework for ingesting, organizing, curating, preserving and providing access to digital collections.Some key features of Openlib include:Flexible, extensible metadata architecture supporting common metadata standardsTools and...
Gitden Reader
Gitden Reader is a free, open-source eBook reader application for Windows. It supports a wide variety of eBook formats including ePub, PDF, MOBI, AZW, CBR, CBZ, and more. Some key features of Gitden Reader include:Intuitive and customizable interface for organizing and reading eBooksSupports both reflowable and fixed-layout eBook formatsAnnotations, bookmarks,...
SourcePDF
SourcePDF is an free and open-source PDF editor available for Windows, Mac and Linux operating systems. It provides a wide range of PDF editing and manipulation capabilities to enable both individual and business users to work effectively with PDF documents.With SourcePDF, users can view, edit, annotate, sign, fill forms and...
MReader
MReader is a feature-rich yet easy to use RSS reader and news aggregator application for Windows. It enables you to subscribe to your favorite websites and blogs and read their latest articles in one convenient app instead of visiting multiple websites.Some of the key features of MReader include:Support for all...
Lektz eBook Reader
Lektz eBook Reader is a versatile, customizable ebook reading app for Windows, Linux and macOS. As an open-source alternative to apps like Kindle or iBooks, Lektz gives you control over the reading experience while supporting all major ebook formats.At its core, Lektz provides an efficient interface for accessing and reading...
BookBox Reader
BookBox Reader is a free, open source eBook reader application designed specifically for children and language learners. It provides an accessible reading experience for all levels with features like text-to-speech support, dictionary look-ups, text magnification, dyslexia-friendly fonts, and more.With BookBox Reader, users can open PDFs, EPUBs, MOBI, FB2 and other...
