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Apple Books vs Koodo Reader: catalog facts
Apple Books	Koodo Reader
Free The app is free; ebooks and audiobooks are bought individually with no subscription.	Free Free and open source under the AGPL-3.0.
macOS, iOS	Windows, macOS, Linux, Android, iOS, Web
Ebooks and audiobooks in a single app Reading position syncs through iCloud	Over fifteen formats including EPUB, PDF, MOBI, AZW3, comic archives and DOCX Syncs through storage you already control rather than a vendor cloud
Only available on Apple devices Store purchases are tied to Apple's ecosystem	It reads DRM-free files only; books bought from a store with DRM will not open Sync depends on whatever storage you configure, so the setup is on you
Downloadable app	Downloadable app, Web application
Closed source	Open source
License not stated	License: AGPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 20, 2026

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