CO3 is a free reader app for Archive of Our Own (AO3). We built it because other AO3 apps charge money for features that should be free.
The goal is to give you a better reading experience on your phone with features like native AMOLED support, local reading history, and custom categories to organize your stories.
Tip
Looking for download links? Go here.
- Custom library - Save your favorite works in one place
- Category management - Organize your stories however you want (without paying for it)
- History with filters - Find works you've read by date
- Completely free - No subscriptions, no ads, ever
- Auto Updates - Automatically fetch and notify you of update on your saved works
- Statistics - See what are you favorite tags and authors, how many works you started and how many chapter you've read
- Enhanced downloads - Enable full work-style download support, with multiple auto-download features
Note
Need help or want to chat? Join our Discord.
We recommend you use F-Droid to install the client, this will allow for auto-updates and alert you if any vulnerabilities are found.
Caution
Since the dev team doesn't own any Apple device, we are not able to provide proper testing to the platform. Hence, we would really appreciate any feedback for this platform. Some unexpected bug and crashes can appear on this platform, but multiple users reported it working properly.
You can get releases here.
You can get android dev builds here.
You can get IOS dev builds here.
The name "CO3" or "Client Of Our Own" and the project logo are copyright © Tbvns and are not covered by the GPL license. You may not publish this application or any derivative under the same name or logo on the Google Play Store, Apple App Store, or any other proprietary app store. Redistribution via F-Droid or direct APK sideloading is permitted.
Copyright (C) 2026 Tbvns
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see https://www.gnu.org/licenses/.