Usagi
Usagi is a free, open-source reading app for Android. Open-source manga reader for Android. It has 270 GitHub stars and is released under the GPL-3.0-only license, and you can install it from F-Droid.
- Android
- Kotlin
- E-book, PDF & RSS readers
- Actively maintained
About Usagi
Usagi is a free and open-source manga reader for Android, inspired by Kotatsu Usagi's unique features: - Bypass internet firewalls with tunnels built into the app, expanding access to more content. - Integrate more new user interface styles (Modern, Classic, etc.) - Improve the ability to customize / read offline / downloaded manga. - The accompanying services are regularly updated (Sync server / client, bot, proxy, etc.) - Optimized for low-end devices / phones, continue to maintain / support for Android 5.0+ - Providing access to content with external plugins / extensions. - Provides bug fixes for features that previously existed in Kotatsu.
Privacy and F-Droid
F-Droid builds Usagi from its published source code and flags anti-features such as ads, tracking or reliance on non-free services.
- Relies on a non-free network service
Screenshots
Screenshots from the app's F-Droid listing.
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What is Usagi?
Usagi is a free, open-source reading app for Android. Open-source manga reader for Android. It has 270 GitHub stars and is released under the GPL-3.0-only license, and you can install it from F-Droid.
Is Usagi free and open source?
Yes. Usagi's source code is public on GitHub under the GPL-3.0-only license, which is OSI-approved or FSF-free. F-Droid flags these anti-features on its latest build: relies on a non-free network service.
How do I install Usagi?
You can install Usagi from F-Droid (package org.draken.usagi); the links are on this page. Its GitHub repository also publishes releases (latest: v1.2).
Is Usagi still maintained?
The repository's most recent commit was on Oct 7, 2026. Its F-Droid listing was last updated on Sep 5, 2026. appsgit only lists apps whose repository had a commit in the last six months.