In today's interconnected world, where countries’ borders blur and cultural identities mix together, the digital landscape presents both opportunities and challenges. This thesis focuses on the design of a mobile application tailored to engage a culturally diverse user base, with a focus on Sweden’s multicultural landscape. By synthesizing insights from cultural theories and design principles, the study addresses the need for practical guidance in crafting culturally sensitive interfaces. Through iterative design and empirical research, key factors influencing user engagement are identified, and strategies for integrating cultural awareness into design choices are proposed. The collaboration with Svensk Form, the Swedish Society of Crafts and Design, highlights the project's real-world relevance and practical application. The study contributes to User Interface (UI) and User Experience (UX) design and cultural studies by providing practical insights for designing for multicultural audiences. By navigating the complexities of Sweden's multicultural landscape, the research offers a roadmap for creating mobile applications that resonate with culturally diverse users.