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