Augmented reality (AR) functions in mobile apps by overlaying digital content onto the real world, enhancing the user experience. AR utilizes the device's camera and sensors to analyze the surroundings and integrate information seamlessly. For example, applications in the retail sector allow customers to visualize products in their space before purchase, while education apps can provide interactive learning experiences by merging digital graphics with physical environments. AR enhances user engagement by making interactions more immersive and informative. As technology advances, the potential for AR in various domains—from gaming to training—continues to grow.