¿Cómo Llego? Rosario is a free Android app developed by cualbondi that allows users to conveniently access the services of EMR. With this app, users can easily search for bus lines that will take them from one point of the city to another. The app also provides a map of Rosario city, which shows the routes and locations of bus stops. Users can click on any stop to see when the next bus is expected to arrive.

In addition, users can check the arrival time of a bus by entering the line number and the stop or by searching for the stop number using the street names. The app also allows users to save a history of their recent searches and add them to their favorites. The app also lets users create shortcuts to the "Cuándo Llega" search directly on their Android home screen, making it even more convenient to use.

Overall, ¿Cómo Llego? Rosario is a practical and user-friendly app that makes it easier for people to navigate the city using public transportation.