Cuando llega Interbus is a free Android app developed by EFISAT that allows users to track the real-time arrival of buses at a specific bus stop. The app offers several options and features to make the process of tracking bus arrival time easier and more convenient. One of the most notable features of the app is the ability to save favorite bus stops. Additionally, the app provides information 24/7, 365 days a year, and uses the phone's internet service, so there are no extra costs to the user. Users can also share the app and upcoming bus arrivals via SMS or social media. The app displays bus arrivals in real-time on a map, making it easier to track the bus's location.