Meet the new MetricKit

Discover Music Understanding, a new framework that lets your app analyze audio across six dimensions, on device: key, rhythm, structure, pace, instrument activity, and loudness. And use the Music Understanding Lab sample app to visualize each result.

Learn how to evaluate model-driven experiences using the Evaluations framework. In a probabilistic world, unit tests alone won’t suffice. Discover how to define metrics, automatically grade outputs, and aggregate statistics to ensure your AI-powered features perform reliably across Apple’s platforms.

Get a first look at Now Playing — a Swift framework that connects your app’s media playback to system surfaces like the Lock Screen, Control Center, Dynamic Island, and CarPlay. Discover how to publish playback state and respond to commands using its observable API. Explore remote playback sessions, a new capability that lets your app represent media playing on external devices and bring full playback controls to those same system surfaces.

Discover Core AI, Apple’s new framework for on-device AI model deployment. Tour the ecosystem, from Python libraries for converting, authoring, and optimizing models, to a Swift API for simple plug-and-play inference and advanced use cases with strict latency and memory requirements. Explore the new Core AI models repository with ready-to-run examples for popular architectures. See how deep Xcode integration, including ahead-of-time model compilation, streamlines the workflow so you can deliver smarter, more responsive app experiences.