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Librera Reader vs ReadBear: catalog facts
Librera Reader	ReadBear
Free Free to download.	Free Free and open source under the MIT licence.
Android	Android
Wide format support including DjVu and comics Auto-scan of book folders with reading progress	Reads PDF and CBZ comic files in one app Many reading options: layout, theme, spacing, language
Android only Many settings can take time to learn	EPUB support is described as unfinished Small, young project with one main developer
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: MIT
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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