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Prologue vs Apple Books: catalog facts
Prologue	Apple Books
Freemium Available on the App Store; check the store listing for current pricing.	Free The app is free; ebooks and audiobooks are bought individually with no subscription.
iOS	macOS, iOS
Works with both Plex and Audiobookshelf Offline downloads for listening without a connection	Ebooks and audiobooks in a single app Reading position syncs through iCloud
Apple devices only Requires your own Plex or Audiobookshelf server	Only available on Apple devices Store purchases are tied to Apple's ecosystem
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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