This book aims to democratize MATLAB’s power, making its advanced computational capabilities accessible to a wider audience, including those less familiar with traditional command-line programming. Through step-by-step examples, we guide readers through the process of developing functional applications, covering essential topics like debugging and deployment. We strive to bridge the gap between abstract MATLAB code and tangible, interactive interfaces, enabling users to create tailored tools for various fields, from scientific research to engineering design. This book’s main goal is to provide a clear and practical guide to building interactive applications within the MATLAB environment. Here, we meticulously detail the App Designer's visual layout tools, empowering readers to seamlessly integrate GUI components like buttons, sliders, and plots. This book’s focus extends beyond mere component placement, delving into the critical aspect of writing callback functions—the MATLAB code that breathes life into these interfaces. By demonstrating how to manage data flow between the GUI and MATLAB’s computational engine, and by illustrating the creation of dynamic visualizations, we equip readers with the tools to transform complex MATLAB scripts into user-friendly applications.