The rapid expansion of mobile-commerce (m-commerce) has transformed digital purchasing behavior worldwide, driven by smartphone adoption, mobile payments, real-time logistics, and platform-based ecosystems. Despite global technological diffusion, consumer interaction design must adapt to regional cultures, accessibility norms, device penetration, payment behaviors, and language systems. This study examines international design patterns for m-commerce apps across Asia, Europe, North America, Africa, and Latin America. Findings indicate that Asian markets prioritize social-commerce integrations and gamified UX, Western markets emphasize minimalist privacy-centric design, while emerging markets require lightweight interfaces, cash-compatible payment flows, and offline-first architecture. A global framework is proposed to guide cross-cultural mobile commerce design.