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CO3

Feature riche, open source, AO3 mobile client

Depends on a specific server

Developer
Tbvns
License
GPL-3.0-or-later
Package
com.co3
Category
Reading
Latest version
V0.1.0-RC1 · Sep 17, 2026
Minimum Android
Android 7.0

Download V0.1.0-RC1

Screenshots

CO3 screenshot 1 CO3 screenshot 2 CO3 screenshot 3 CO3 screenshot 4 CO3 screenshot 5 CO3 screenshot 6 CO3 screenshot 7

Description

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.

All versions

VersionReleasedMinimum AndroidSize
V0.1.0-RC1 (4 builds) Sep 17, 2026 Android 7.0 48 MB
B0.0.20 (4 builds) Aug 16, 2026 Android 7.0 47.9 MB
B0.0.19 (4 builds) Aug 5, 2026 Android 7.0 47.3 MB
B0.0.18 (4 builds) Jul 28, 2026 Android 7.0 47.2 MB
B0.0.17 (4 builds) Jul 18, 2026 Android 7.0 47.2 MB
B0.0.16 (4 builds) Jul 13, 2026 Android 7.0 47.2 MB
B0.0.15 (4 builds) Jul 10, 2026 Android 7.0 47.1 MB
B0.0.14 (4 builds) Jul 3, 2026 Android 7.0 32.7 MB
B0.0.13 (4 builds) Jul 1, 2026 Android 7.0 28.2 MB
B0.0.12 (4 builds) Jun 26, 2026 Android 7.0 28.2 MB
B0.0.11 (4 builds) Jun 14, 2026 Android 7.0 28.2 MB
B0.0.10 (4 builds) Jun 13, 2026 Android 7.0 28.2 MB
B0.0.9 (4 builds) Jun 1, 2026 Android 7.0 28.2 MB
B0.0.8 (4 builds) May 28, 2026 Android 7.0 28.2 MB
B0.0.7 (4 builds) May 27, 2026 Android 7.0 28.2 MB
B0.0.6 (4 builds) May 27, 2026 Android 7.0 28.2 MB
B0.0.5 (4 builds) May 23, 2026 Android 7.0 28.2 MB

How to install an older version of an Android app · How to install an APK file on Android

From the developer (GitHub)

APK files published by the developer on GitHub. They are signed by the developer and may not install over the other builds on this page (different signature). Links open github.com.

V0.1.0-RC1 Pre-release · Sep 15, 2026
CO3-Android-arm64-v8a.apk 47.4 MB CO3-Android-armeabi-v7a.apk 41.6 MB CO3-Android-x86.apk 48.4 MB CO3-Android-x86_64.apk 47.8 MB
B0.0.20 Pre-release · Aug 13, 2026
CO3-Android-arm64-v8a.apk 47.4 MB CO3-Android-armeabi-v7a.apk 41.6 MB CO3-Android-x86.apk 48.4 MB CO3-Android-x86_64.apk 47.8 MB
B0.0.19 Pre-release · Aug 3, 2026
CO3-Android-arm64-v8a.apk 46.8 MB CO3-Android-armeabi-v7a.apk 41 MB CO3-Android-x86.apk 47.8 MB CO3-Android-x86_64.apk 47.2 MB

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