Readest is a modern, open-source ebook reader for Windows, macOS, Linux, iOS, Android, and the web.
Cost / License
- Free
- Open Source (AGPL-3.0)
Application types
United StatesPlatforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Flathub
- Flatpak
+2
calibre AlternativesOnly apps categorised as PDF Readers
The best PDF Reader alternative to calibre is Readest, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to calibre and many of them are PDF Readers so hopefully you can find a suitable replacement. Other interesting PDF Reader alternatives to calibre are KOReader, Foliate, Librera Reader and Koodo Reader.
filter to find the best alternatives
calibre alternatives are mainly PDF Readers, but if you're looking for Ebook Readers or Ebook Libraries you can filter on that. Other popular filters include Android, Self-Hosted, Chrome OS, Android Tablet, Open Source, Mac and Linux + Open Source. These are just examples - use the filter bar below to find more specific alternatives to calibre.
Alternatives list
19 Readest alternatives
86 KOReader alternativesAn ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Kindle, Kobo, PocketBook, Linux and Android devices.
Cost / License
- Free
- Open Source (AGPL-3.0)
Application types
Platforms
- Linux
- Android
- Android Tablet
- AppImageHub
- Kobo Books
- Flathub
- F-Droid
- Kindle Fire
- Linux Mobile
+3
75 Librera Reader alternativesLibrera 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.
Cost / License
- Freemium
- Open Source
Application types
Platforms
- Android
- Android Tablet
- F-Droid
+7
36 Koodo Reader alternativesKoodo Reader is a powerful ebook reader designed to provide a simple and easy-to-use reading experience.
Cost / License
- Free
- Open Source (AGPL-3.0)
Application types
Platforms
- Mac
- Windows
- Linux
- Online
- Flathub
- Android
- iPhone
- iPad
+2
90 ReadEra alternativesRead 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.
+9
76 Openlib alternativesOpenlib 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.
+5
59 Episteme Reader alternativesEpisteme Reader is an offline-first application designed for reading various document formats. It leverages native Android technologies and C++ libraries to provide a performant reading experience with customization capabilities.
Cost / License
- Freemium
- Open Source (AGPL-3.0)
Application types
Platforms
- Android
- Android Tablet
- F-Droid
- Windows
+1
185 Kavita alternativesLightning fast with a slick design, Kavita is a rocket-fueled self-hosted digital library which supports a vast array of file formats. Install to start reading and share your server with your friends. book reader, self hosted, manga, comics, free, manhwa, e readers, electronic...
Cost / License
- Freemium
- Open Source (GPL-3.0)
Application types
Platforms
- Mac
- Windows
- Linux
- Self-Hosted
- Cloudron
+4
Customizable reader for EPUB, MOBI, AZW, PDF, FB2, and TXT, offering text-to-speech, bookmarks, highlighting, notes, adjustable fonts, color themes, intuitive interface, quick annotations, search, theme customization, and background image support.
+3
47 Thorium Reader alternativesThorium Reader is a free, open source multi-language EPUB reader for Windows 10, MacOS and Linux. It's privacy aware and highly accessible for visually impaired and dyslexic people.
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A very feature-full reading app. I use it with my PocketBook Color and PocketBook InkPad Color and it is much snappier than the default reading app.