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Readwide vs Chaka Book Reader: catalog facts
Readwide	Chaka Book Reader
Free Free and open source under the Apache 2.0 licence.	Free Free and open source under AGPL-3.0-or-later.
Android	Android
Opens many formats, including HWP/HWPX and comic archives Reading history search and bookmarks	Opens a very wide range of document and comic formats Reads files directly from archives
Young project with a small user base Android only	Android only No release downloads listed on the repository
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: AGPL-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.