청주버스 is a free Android application developed by Hi Apps. It falls under the Travel & Navigation category, specifically Maps & GPS. The app provides real-time bus arrival information for Cheongju City, although it is important to note that the accuracy and availability of the information may vary depending on the server's situation. The application allows users to bookmark frequently used bus stops and routes, providing a convenient way to access them. Additionally, users can add notes to their bookmarks for easy reference. The app also includes a search feature for finding bus stops and their respective arrival times, as well as a GPS integration for locating nearby bus stops. Lastly, users can search for bus routes and view the entire route path. Overall, 청주버스 offers essential features for navigating the bus system in Cheongju City.