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Episteme Reader vs Librera Reader: catalog facts
Episteme Reader	Librera Reader
Free Free and open source under the AGPL-3.0.	Free Free to download.
Android, iOS	Android
Reads PDF, EPUB, MOBI and AZW3 in one app Also opens Markdown, HTML and plain text	Wide format support including DjVu and comics Auto-scan of book folders with reading progress
Desktop and iOS versions are not confirmed as released Contributions require signing a CLA	Android only Many settings can take time to learn
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0	License: GPL-3.0
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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