This study, conducted within the scope of the FAIST project, explores the design and development of a digital interface for personalized footwear. The primary objective is to create an intuitive and user-centered interface that enables individuals to scan their feet, personalize footwear models, and complete purchases. This paper presents the outcomes of the first research phase, which comprises a comprehensive literature review on gamification, e-commerce, UX/UI design, and usability heuristics, along with a comparative analysis of leading digital interfaces for personalized footwear acquisition. The main outcome of the investigation was the identification of essential design requirements that will serve as guidelines for the future stages of prototype development.