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ReadEra vs Fossify Documents: catalog facts
ReadEra	Fossify Documents
Free Free to download and use without ads, according to the developer.	Free Free and open source under the GPL 3.0, with no ads.
Android, iOS	Android
Opens EPUB, MOBI, PDF, DjVu, Word, FB2 and comic files Reads books directly from ZIP and RAR archives	Opens PDF, DOCX, Markdown, CSV and HTML in one app Edits text, Markdown and CSV files
Closed source Mobile only, with no desktop version	Still in beta DOCX files are view-only
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-only
No account needed	No account 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.