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Aidoku vs Paperback: catalog facts
Aidoku	Paperback
Free Free, open source and ad-free.	Free No ads; the site does not list any charges.
macOS, iOS	iOS
Open source with no ads Imports local files and connects to media servers	No ads Extensions add content sources
Apple platforms only External sources must be added separately	iOS and iPadOS only Content depends on third-party extensions
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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