HUMAN-CENTERED MOBILE APPLICATION DESIGN FOR SAUDI DIGITAL SERVICES UNDER VISION 2030: INTEGRATING ACCESSIBILITY, RESPONSIVE PERFORMANCE, USABILITY, AND UNIFIED DESIGN SYSTEMS

Saudi Arabia’s digital-service transformation increasingly depends on mobile applications that must work for diverse users, devices, network conditions, and service contexts. This review develops a human-centered framework for designing Saudi mobile services by integrating accessibility, responsive performance, usability, and unified design systems rather than treating these concerns as separate quality activities. Literature published from 2020 to 2025 was synthesized through a structured integrative review covering mobile usability, accessibility evaluation, non-functional testing, design-system practice, and Saudi digital-government adoption. The evidence shows that accessible interaction requires more than automated conformance checks; representative user testing, assistive-technology compatibility, clear Arabic and right-to-left behavior, and inclusive task design remain essential. Performance is similarly experiential: latency, unstable connectivity, device constraints, and visual reflow influence whether users perceive a service as understandable and trustworthy. Usability evidence supports combining task success, error analysis, standardized questionnaires, and behavioral feedback rather than relying on a single score.