Managed the redesign and feature updates for TREASURE’s official Light Stick app, focusing on unique features not typically seen in other idol light stick apps. Updates included an intuitive light stick update process, ASMR functionality, exclusive artist content, and seamless integration for purchasing merchandise. The app was redesigned to enhance the user experience, reflecting TREASURE's youthful energy through vibrant colors and dynamic visuals. Additionally, I managed promotional content to introduce and guide users through the new app features.