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Episteme Reader vs MJ PDF: catalog facts
Episteme Reader	MJ PDF
Free Free and open source under the AGPL-3.0.	Free Free and open source under the GPL 3.0 licence.
Android, iOS	Android
Reads PDF, EPUB, MOBI and AZW3 in one app Also opens Markdown, HTML and plain text	Library view with recent files, folders and reading history Dark mode for the PDF content as well as the interface
Desktop and iOS versions are not confirmed as released Contributions require signing a CLA	Android only A reader with annotations rather than a full PDF editor
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0	License: GPL-3.0-only
Not stated if an account is needed	No 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.