The real estate industry is witnessing a growing trend of using mobile applications for property searches, fueled by the rising popularity of mobile technology. However, despite the widespread adoption of these apps on a global scale, their usage, especially within the Greek market, has not been adequately evaluated, particularly concerning their usability and user experience aspects. The study investigates the usability assessment of "Spitogatos", a popular real estate application in Greece. A representative group of 10 users was involved in the research, to assess the convenience and efficiency of the property search and securing process within the application. The testing phase revealed several usability issues, primarily related to features such as location search, editing search results, saving and removing properties, and applying filters. The analysis of user feedback and observations also revealed challenges with certain screens lacking a clear visual hierarchy, causing confusion and frustration among users. Based on the findings, several recommendations are proposed to enhance the application's usability, including a user interface revamp of eleven screens. Finally, the study discusses the importance of incorporating iterative usability testing into the design process, future research directions and acknowledges its limitations.