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TXYZ vs R Discovery: catalog facts
TXYZ	R Discovery
Freemium Free plan available; Pro costs $96 per year and Ultra $288 per year.	Freemium Free to use, with paid plans listed on its pricing page.
Web	Android, iOS, Web, Browser extension
Combines paper search, reading and writing in one workspace Usable free plan with file analysis up to 100 pages	Personalized feed of new research papers Chat PDF and AI answers with references
Free plan keeps writing Pages history for only 30 days Larger files and higher limits require a paid plan	Some features require a paid plan Closed source hosted service
Web application	Downloadable app, Web application, Browser extension
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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