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Librera Reader vs Fossify Documents: catalog facts
Librera Reader	Fossify Documents
Free Free to download.	Free Free and open source under the GPL 3.0, with no ads.
Android	Android
Wide format support including DjVu and comics Auto-scan of book folders with reading progress	Opens PDF, DOCX, Markdown, CSV and HTML in one app Edits text, Markdown and CSV files
Android only Many settings can take time to learn	Still in beta DOCX files are view-only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-only
No account needed	No account needed
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.