Feature riche, open source, AO3 mobile client

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Antivirus & safety scan results

Scan Date: Jun 9, 2026 Software Version: B0.0.9

Status: ✅ Trusted & Safe to install This app is signed by Tbvns with trusted and verified digital signature and it will updated existing CO3 installations Certificate fingerprint: b03c04aa0224ee45b0e1857decb7c9ed9794da54 Issuer: C:UK, CN:FDroid, L:ORG, O:fdroid.org, ST:ORG, OU:FDroid How we verify APK files security

Android antivirus Status

K7GW Clean ✅

DrWeb Clean ✅

VirIT Clean ✅

ClamAV Clean ✅

Google Clean ✅

Ikarus Clean ✅

Lionic Clean ✅

Sophos Clean ✅

Yandex Clean ✅

Alibaba Clean ✅

Tencent Clean ✅

Xcitium Clean ✅

Fortinet Clean ✅

Kingsoft Clean ✅

Symantec Clean ✅

AhnLab-V3 Clean ✅

Kaspersky Clean ✅

Microsoft Clean ✅

Trustlook Clean ✅

ESET-NOD32 Clean ✅

Avast-Mobile Clean ✅

NANO-Antivirus Clean ✅

BitDefenderFalx Clean ✅

CO3 Books and comics app for Android 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.

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Screenshots & Video

Specifications

Package Name	com.co3
Requirements	Android 7.0 (Nougat API 24)
Author	Tbvns
APK Size	28.2 MB
Categories	Lifestyle, Books and comics, Fun and Jokes
Source Code	https://github.com/tbvns/CO3