Digital technology and artificial intelligence are powerful tools for documenting and modeling historic architecture. Yet there remains a substantial need to present information about symbolism, construction, and purpose in accessible, standardized, and engaging forms, especially on-site. This paper presents the design and development of a mobile application that leverages Augmented Reality (AR) to enable visitors to scan sculptures at the UNESCO World Heritage Site, Rani-ki-Vav, and receive detailed breakdowns of iconography, construction techniques, and cultural symbolism. We adapted the original kiosk-based system to enable portable, personalized engagement via smartphone, retaining all research stakeholders, methodology, and content strategies. Human-centered design guided app development, and extensive stakeholder engagement ensured cultural and linguistic inclusivity. This approach demonstrates how AR mobile technology enhances heritage interpretation, accessibility, and visitor satisfaction.