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