Exact – a new cross platform UI framework by the Expo team

The Expo team has released Exact, a cross-platform UI framework that allows developers to write a single app that runs natively on the web, macOS, iOS, and Linux. The framework enables AI agents to build, run, test, and validate applications across all platforms simultaneously, with build times ranging from a few minutes to around an hour for initial setups. Exact uses a unified Contract-based approach to define UI that adapts to each platform's native controls and design patterns.