Compare software

ReadEra vs MJ PDF: catalog facts
ReadEra	MJ PDF
Free Free to download and use without ads, according to the developer.	Free Free and open source under the GPL 3.0 licence.
Android, iOS	Android
Opens EPUB, MOBI, PDF, DjVu, Word, FB2 and comic files Reads books directly from ZIP and RAR archives	Library view with recent files, folders and reading history Dark mode for the PDF content as well as the interface
Closed source Mobile only, with no desktop version	Android only A reader with annotations rather than a full PDF editor
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	Not stated if it 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.