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Book's Story vs Librera Reader: catalog facts
Book's Story	Librera Reader
Free Free, ad-free and open source under the GPL 3.0.	Free Free to download.
Android	Android
Supports EPUB, PDF, FB2, TXT, HTML and Markdown Extensive reading customisation	Wide format support including DjVu and comics Auto-scan of book folders with reading progress
Android only Last code update was in early 2026	Android only Many settings can take time to learn
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it 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.