碳竹雞 is an iPhone app developed by YINGYUN CHEN, available for free in the Utilities & Tools category. The app centers around the concept of helping Earth's carbon bamboo chickens collaborate with humans by using the "City Alchemy Box (Smart Recycling Machine)" developed by the team led by Polu Lu. Users can earn gold coins from Mud Slip Island by following the recycling machine's process and depositing recyclables at various locations.

The 碳竹雞 app aims to raise awareness about Earth's carbon footprint issues and promote environmental sustainability through engaging gameplay and recycling challenges, providing users with a fun and educational experience while contributing to a greener planet.