The aim of this thesis was to show the entire process of designing and creating a mobile application prototype that would be used for simpler finding the contact numbers and reviews of all doctors of medicine and stomatology in the narrower and wider area of the city of Pula. Firstly, the topics of design thinking, user experience design and user interface design were covered. After that, the low-fidelity prototyping process in the Wireframe CC tool, as well as the high-fidelity prototyping process in the Figma tool, were shown. Furthermore, the aim of this thesis was also testing the created high-fidelity prototype in order to evaluate the user experience and usability of the prototype on real users using the remote usability testing method and survey method. The evaluation of usability of the mobile application prototype was done through Maze platform, while the evaluation of user experience was done through Google form. Before the actual evaluation, the aim was to define the attributes/constructs with the corresponding items. In the last chapter, the testing of relationships between the constructs was carried out in order to try to accept or reject the defined research hypotheses. The non-parametric PLS-SEM method was used to test the relationships between the defined constructs, while SmartPLS version 3.3.9 was used as a programming tool.