Buster is a travel and navigation application designed for Android users, primarily focused on enhancing the bus travel experience in Zealand, Lolland, Falster, and Møn. It provides real-time bus tracking on a live map, allowing users to see the exact location of their bus and estimate arrival times at their chosen bus stops. With access to information from over 13,000 bus stops, Buster simplifies public transport navigation for its users.

In addition to bus tracking, Buster allows users to personalize their experience by saving favorite stops for quick access to departure times. The app also includes functionality to track Lokaltog, making it easier to switch between bus and train services. With a focus on user privacy, Buster operates without requiring logins or accounts, storing data locally unless users consent to sharing statistical information.