코스카톡 is a mobile app developed by 대한전문건설협회 (Korea Specialized Construction Association) to facilitate real-time communication between the central association and its member companies in the construction industry. The app serves as a platform for addressing issues and concerns faced by construction sites, as well as providing prompt solutions to member companies' grievances.

The app offers several key features to enhance communication and collaboration. First, there is the "신문고" (Shinmungo) feature, where member companies can submit inquiries or requests for assistance, and receive responses from the association's president or relevant departments. Additionally, the "소통채널" (Communication Channel) allows member companies to exchange opinions and discuss matters related to legal amendments or improvements in the construction industry. The app also includes a "설문참여" (Survey Participation) feature, which serves as a platform for collecting member companies' opinions on urgent issues and important matters. Lastly, the "공지사항" (Announcements) section provides essential updates on association activities, events, and promotions.