Nowadays, various mobile applications are used to solve everyday problems, saving time, and resources to users. The present research aims to solve one of the needs from the city of Loja that is related to health services. The city of Loja as well as the rest of the Ecuadorian country does not have the technology that facilitates quick search of the drug stores on duty. The model of the proposed mobile app includes interactivity features, automatic update of easy use for users that do not offer other applications of similar characteristics. During the development of this work, it has been considered various aspects related to the users that will make use of this application as: the type of mobile device that is used, the operating system, and software architectures. Considering the features and services, it was chosen the SOA-based architecture. Through this work, it is intended to measure the impact that the application might have in the city of Loja and the benefits that this can bring. Likewise, it has been specified the operation of the application as well as the options of search; in the same way, it is presented all the prototype from the perspective of the user in order to provide an efficient service to customers, who are looking for a drug store on duty according to the sectors of the city during 24 hours a day.