Global Positioning Systems (GPS) now provide great benefits for companies that need the location of a device or a point of interest. Today, smart mobile devices have increased exponentially by the features that these devices are able to offer thanks to their processing power. This document develops an application that provides a location service for university users, giving the facility to know the time of arrival of a bus from its current location to a previously established stop. Also defined is the methodology in the construction of the system, the REST architecture applied to the construction of the web service, which allowed to improve the performance of the application, which was created Android platform devices, allowing any mobile device to operate With this Operating System will be able to run the application and make use of it.