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BookPlayer vs Cozy: catalog facts
BookPlayer	Cozy
Free Free to download; source code is public.	Free Free and open source.
iOS	Linux
Dedicated to DRM-free audiobook files Open source	Built specifically for audiobooks rather than music Organizes local audiobook files into a library
iOS only Does not play DRM-protected store audiobooks	Linux only Does not buy or stream books from any store
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
Not stated if an account is needed	No account needed
Works offline	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.