Compare software

Book's Story vs Chaka Book Reader: catalog facts
Book's Story	Chaka Book Reader
Free Free, ad-free and open source under the GPL 3.0.	Free Free and open source under AGPL-3.0-or-later.
Android	Android
Supports EPUB, PDF, FB2, TXT, HTML and Markdown Extensive reading customisation	Opens a very wide range of document and comic formats Reads files directly from archives
Android only Last code update was in early 2026	Android only No release downloads listed on the repository
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: AGPL-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 October 2, 2026

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