Key features of augmented reality (AR) applications include the ability to overlay digital content onto the real world, enhancing user interactions and experiences. AR uses technologies such as GPS, camera feeds, and sensors to integrate graphics, audio, and other sensory enhancements. This allows for real-time interactions with virtual elements, creating immersive experiences in gaming, education, and retail. The use of mobile devices or AR glasses enables users to visualize and interact with 3D objects seamlessly. Additionally, AR applications often include tracking and gesture recognition to further engage users in the interactive environment.