Compare software

Prologue vs ShelfPlayer: catalog facts
Prologue	ShelfPlayer
Freemium Available on the App Store; check the store listing for current pricing.	Free Free; source code is published on GitHub.
iOS	iOS
Works with both Plex and Audiobookshelf Offline downloads for listening without a connection	Native iOS interface Works with self-hosted Audiobookshelf libraries
Apple devices only Requires your own Plex or Audiobookshelf server	Requires an Audiobookshelf server iOS only
Downloadable app	Downloadable app
Closed source	Open 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 October 2, 2026

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