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ReadEra vs Librera Reader: catalog facts
ReadEra	Librera Reader
Free Free to download and use without ads, according to the developer.	Free Free to download.
Android, iOS	Android
Opens EPUB, MOBI, PDF, DjVu, Word, FB2 and comic files Reads books directly from ZIP and RAR archives	Wide format support including DjVu and comics Auto-scan of book folders with reading progress
Closed source Mobile only, with no desktop version	Android only Many settings can take time to learn
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
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 September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.