Green-Book

Project Overview

Green Book is a third-party Android client for Coolapk, derived from the now-removed open-source project c001apk-compose. After the original author deleted that project, this repository preserves it as a backup with a few adjustments, shipping the source in the form of decompiled Smali. It keeps the original Jetpack Compose interface and community browsing experience, and you can build it yourself or grab an installer from Releases.

A preserved backup of a Coolapk third-party client.

Key Features

• Community browsing: sign in with a Coolapk account to browse feeds, posts, and tech content
• Version alignment: the client version is bumped to Coolapk official 16.2.1
• Real device info: device spoofing is removed in favor of reading the real device parameters
• Localized home screen: labels on the Home interface are localized
• Smali source: provided as decompiled output, easy to read and study line by line
• Self-building: the repository URL and app name are changed to Green Book, so you can package it yourself

Target Audience

• Long-time Coolapk community users
• Android developers learning app internals
• Researchers interested in decompiling and repackaging

Quick Start

1. Download the installer from the repository Releases, or build it locally
2. Allow installation from unknown sources on your Android device and install
3. Open the app, sign in with your Coolapk account, and browse the community
4. To make changes, read the Smali source directly, modify it, and repackage

Core Advantages

• Still obtainable: the original project was deleted, but this backup keeps the client available
• Transparent changes: every modification is listed item by item for easy verification
• Direct to use: it retains the original client's full functionality and works right after sign-in

System Requirements

Item	Requirement
OS	Android
Runtime	An Android version that supports Jetpack Compose
Installation	Install the APK, allowing apps from unknown sources

Notes

• This project is for study and research only; do not use it commercially or for illegal purposes
• Delete the app and all installers within 24 hours of downloading, and support the official Coolapk
• Any legal liability arising from use of this app rests with the user