Jetpack Compose Glimmer is Google's design system specifically created for Android extended reality (XR) experiences on AI glasses with transparent displays. It represents a fundamental rethinking of interface design principles for a new form factor where the interface lives constantly within human perception.

The design system prioritizes glanceability and ambient motion while addressing unique challenges of transparent displays. Key features include redefined UI physics for additive displays, optimized typography using visual angle measurements, high-contrast color systems that work against real-world backgrounds, and motion design that guides rather than distracts. The system includes components like notifications, navigation cards, music players, and volume sliders designed specifically for transparent screen environments.

The system works by understanding that the interface appears at a perceived depth of about one meter away (arm's length) rather than on the lens surface itself. This requires users to consciously shift their focus from the real world to engage with the UI. The design approach embraces additive display technology that can only add light, not create opaque black, leading to innovative solutions like redefining "black" as a container and using dark surfaces with bright content.

Benefits include creating interfaces that harmonize with the real world rather than fighting it, ensuring legibility across diverse environments, and providing experiences that earn user attention through graceful integration. The system enables helpful information to appear when needed while disappearing when not in use, creating truly ambient displays.

The target users are Android developers and designers building XR experiences for AI glasses. The system includes Jetpack Compose Glimmer for development and a Figma kit for design workflows, providing comprehensive tools for creating applications that work seamlessly with transparent display technology.