Books & News · Open source
CO3
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Feature riche, open source, AO3 mobile client
Download
Opens the official F-Droid page
About CO3
A free reader app for Archive of Our Own (AO3).
Built because other AO3 apps charge money for features that should be free.
Features:
Custom library with favorites
Category management and organization
Reading history with filters
Native AMOLED support
Offline reading
No subscriptions, no ads, ever.
How to install CO3
- Tap Download — the app's official page on F-Droid opens.
- Install it with the F-Droid app (recommended, for automatic updates), or use the download button on that page.
- If Android asks, allow the F-Droid app or your browser to install apps, then tap Install.
- Open CO3 from your app drawer.





