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Moon+ Reader vs MJ PDF: catalog facts
Moon+ Reader	MJ PDF
Freemium Free version available, with a paid Pro version.	Free Free and open source under the GPL 3.0 licence.
Android	Android
Very wide format support including Markdown and CHM Reads books inside ZIP and RAR archives and OPDS catalogs	Library view with recent files, folders and reading history Dark mode for the PDF content as well as the interface
Android only Some features require the paid Pro version	Android only A reader with annotations rather than a full PDF editor
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-only
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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