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Chaka Book Reader vs Librera Reader: catalog facts
Chaka Book Reader	Librera Reader
Free Free and open source under AGPL-3.0-or-later.	Free Free to download.
Android	Android
Opens a very wide range of document and comic formats Reads files directly from archives	Wide format support including DjVu and comics Auto-scan of book folders with reading progress
Android only No release downloads listed on the repository	Android only Many settings can take time to learn
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0	License: GPL-3.0
No account 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 September 23, 2026

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