Compare software

Moon+ Reader vs Episteme Reader: catalog facts
Moon+ Reader	Episteme Reader
Freemium Free version available, with a paid Pro version.	Free Free and open source under the AGPL-3.0.
Android	Android, iOS
Very wide format support including Markdown and CHM Reads books inside ZIP and RAR archives and OPDS catalogs	Reads PDF, EPUB, MOBI and AZW3 in one app Also opens Markdown, HTML and plain text
Android only Some features require the paid Pro version	Desktop and iOS versions are not confirmed as released Contributions require signing a CLA
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: AGPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	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.