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Sobuu vs Rocinante: catalog facts
Sobuu	Rocinante
Free Free and open source under the Apache-2.0 licence, with no ads.	Free Free and open source under the AGPL-3.0 licence.
Android	Android
Page-by-page reading progress and reading time Comments tied to a page so others avoid spoilers	Works with any BookWyrm instance Native Android interface instead of a web page
Android only Social features depend on other readers using the app	Requires an account on a BookWyrm instance Android only
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: AGPL-3.0-only
No account needed	Account needed
Works offline	Not stated if it 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.