KOReader
KOReader is a free, open-source reading app for Android. An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Cervantes, Kindle, Kobo, PocketBook and Android devices. It has 30,672 GitHub stars and is released under the AGPL-3.0-only license, and you can install it from F-Droid.
github.com/koreader/koreader (opens in a new tab)
Data as of from the GitHub API and the F-Droid index; description from the project's repository or F-Droid listing. Report an error
About KOReader
KOReader is an ebook reader optimized for e-ink screens. It can open many formats and provides advanced text adjustments.
Privacy and F-Droid
F-Droid builds KOReader from its published source code and flags anti-features such as ads, tracking or reliance on non-free services.
No anti-features flagged on the latest F-Droid build.
Screenshots
Screenshots from the app's F-Droid listing.
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Is KOReader free and open source?
Yes. KOReader's source code is public on GitHub under the AGPL-3.0-only license, which is OSI-approved or FSF-free. F-Droid, which builds it from source, flags no anti-features such as ads or tracking on its latest build.
How do I install KOReader?
You can install KOReader from F-Droid (package org.koreader.launcher.fdroid); the links are on this page. Its GitHub repository also publishes releases (latest: v2026.07.1).
Is KOReader still maintained?
The repository's most recent commit was on Oct 27, 2026. Its F-Droid listing was last updated on Aug 3, 2026. appsgit only lists apps whose repository had a commit in the last six months.