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Clearview XCalibre
Paid

Available as a paid app; the App Store listing does not state its price.

 Free

Free and open source, funded by donations.

macOS Windows, macOS, Linux
  • Reads several ebook and comic formats
  • Offers scrolling, page flipping, and single or double page layouts
  • Converts between all the major ebook formats, including for Kindle
  • Fetches metadata and covers from the internet automatically
  • Available for macOS
  • The interface is dense and has accumulated two decades of features
  • It will not remove DRM; that requires third-party plug-ins with their own legal questions
Downloadable app Downloadable app
Closed source Open source
License not stated License: GPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 8, 2026

Checked September 20, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.