In standard app development, the User Interface (UI) is static. You write code for a button, compile it, and it remains a button forever. GenUI flips this model on its head. With GenUI, Google’s Generative UI SDK, your application's interface becomes...

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GenUI is Google's experimental SDK that enables Flutter apps to generate UI dynamically using AI agents like Gemini. Instead of hard-coding widget trees, developers provide a catalog of allowed components and goals, letting the AI assemble interfaces in real-time based on user needs. The guide walks through building a Christmas card generator that demonstrates core GenUI concepts: conversations (interaction lifecycle), surfaces (rendering areas), catalogs (widget constraints), and data models (reactive state). It covers project setup with Firebase AI, creating custom catalog items with JSON schemas, prompt engineering for consistent outputs, and integrating AI-generated widgets into standard Flutter screens. The tutorial emphasizes that GenUI is collaborative rather than autonomous—developers define structure and constraints while AI operates within them to dynamically compose production-ready UIs.

How to Use GenUI in Flutter to Build Dynamic, AI-Driven Interfaces

Mapping GenUI Components to the Christmas Card App

Adding Your Own Widgets to the GenUI Catalog