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
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Flathub
- Flatpak




There are many alternatives to calibre for Mac if you are looking for a replacement. The best Mac alternative 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 available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to calibre are Koodo Reader, Sigil, Kavita and Thorium Reader.
Readest is a modern, open-source ebook reader for Windows, macOS, Linux, iOS, Android, and the web.




Koodo Reader is a powerful ebook reader designed to provide a simple and easy-to-use reading experience.




Sigil is a multi-platform ebook editor. It is designed to edit books in ePub format.



Lightning 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...




Thorium 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.



Citadel helps you manage your ebook libraries. It provides a simple, user-friendly interface to add new books to your library or update book metadata like titles, authors, and tags, all while remaining compatible with Calibre.


A clean and simple way to read your books on any device and build your own online library.



Supports EPUB and PDF formats, reading borrowed library and DRM-protected eBooks on Windows, macOS, tablets, and phones, with features like annotation, syncing across devices, offline reading modes, organizational tools, and custom shelves for managing content.




Free and simple software for removing/decrypting DRM from Kindle, Adobe Digital Editions, Barnes and Noble, Kobo, Sony, Fictionwise eReader, and other ebooks. Many tools included, including stand-alone scripts and a Calibre plugin.

Ubooquity is a free, lightweight and easy-to-use home server for your comics and ebooks. Use it to access your files from anywhere, with a tablet, an e-reader, a phone or a computer.




Reflowable format allows you to create files for Kindle, print, and EPUB. Readers can adjust the size of eBook fonts, margins, and various properties on Kindle.


Calibre2opds can generate OPDS and HTML catalogs from the metadata of the calibre e-book library manager. These catalogs can then be used both to browse your e-book library online and also to download books on demand.




cleaner and significantly better user interface and user friendly.