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ReadEra vs Koodo Reader: catalog facts
ReadEra	Koodo Reader
Free Free to download and use without ads, according to the developer.	Free Free and open source under the AGPL-3.0.
Android, iOS	Windows, macOS, Linux, Android, iOS, Web
Opens EPUB, MOBI, PDF, DjVu, Word, FB2 and comic files Reads books directly from ZIP and RAR archives	Over fifteen formats including EPUB, PDF, MOBI, AZW3, comic archives and DOCX Syncs through storage you already control rather than a vendor cloud
Closed source Mobile only, with no desktop version	It reads DRM-free files only; books bought from a store with DRM will not open Sync depends on whatever storage you configure, so the setup is on you
Downloadable app	Downloadable app, Web application
Closed source	Open source
License not stated	License: AGPL-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 20, 2026

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