Calibre vs Readarr
November 26, 2025
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Calibre is a free, open-source program (written in Python) for managing e-book libraries on Windows, Mac and Linux. It offers the most rich set of features, divided into the following main categories: library management, e-book conversion, synchronization with e-readers, downloading news from the internet and converting them to e-book formats, e-book viewer-reader, e-book editor and a content server for web access to your book collection. The program reorganizes book files into own structure. There are numerous plugins developed for the program by the community. However, many find the interface cluttered and unwieldy.
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Readarr is a ebook collection manager for Usenet and BitTorrent users. It can monitor multiple RSS feeds for new books from your favorite authors. Readarr project has been retired but the code is still available.
See also:
Top 10 eBook Organizers
Top 10 eBook Organizers
Calibre vs Readarr in our news:
2023. Calibre now allows to read books aloud with more voices
New Calibre's update brings more voices to Read Aloud feature. It works only on Windows because uses Microsoft speech subsystem. When Read aloud is speaking, you can make the control bar translucent so that words under the bar are visible. There is a number of other new features. Spell check dialog now allows Up and Down arrow keys to work regardless of focus. Edit book feature now allows automatic fixing of various simple CSS errors. And File browser allows using keyboard shortcuts to re-order the spine. Also from the library you can now open the book folder easily. Add by ISBN feature now allows adding using identifiers other than ISBN as well. The update is bundled Qt to 6.4 this means calibre on macOS is now only supported on Big Sur and newer.
