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Kindle for Web vs Koodo Reader: catalog facts
Kindle for Web	Koodo Reader
Free The reader is free; books are bought or borrowed through Amazon.	Free Free and open source under the AGPL-3.0.
Web	Windows, macOS, Linux, Android, iOS, Web
Nothing to install Highlights, notes and in-book search	Over fifteen formats including EPUB, PDF, MOBI, AZW3, comic archives and DOCX Syncs through storage you already control rather than a vendor cloud
Requires an Amazon account Only reads content from your Amazon Kindle library	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
Web application	Downloadable app, Web application
Closed source	Open source
License not stated	License: AGPL-3.0
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.