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LibreOffice Viewer vs Fossify Documents: catalog facts
LibreOffice Viewer	Fossify Documents
Free Free and open source under the MPL-2.0 licence.	Free Free and open source under the GPL 3.0, with no ads.
Android	Android
Uses the same document engine as desktop LibreOffice Does not share documents with third parties	Opens PDF, DOCX, Markdown, CSV and HTML in one app Edits text, Markdown and CSV files
Simplified compared with the desktop suite Focused on viewing rather than full editing	Still in beta DOCX files are view-only
Downloadable app	Downloadable app
Open source	Open source
License: MPL-2.0	License: GPL-3.0-only
Not stated if an account is needed	No account needed
Not stated if it works offline	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.