Flutter GenUI Tutorial: Build an AI Shopping Assistant
Article Summary
Jorge Coca from Very Good Ventures explores why most AI-powered apps still feel like glorified chatbots. Their Flutter GenUI tutorial shows how to move past text walls and build interfaces the AI itself assembles from your design system.
This beginner-friendly guide from Jorge Coca at Very Good Ventures walks through building an AI shopping assistant using Flutter's experimental GenUI SDK. Drawing from their work on Ask Dash with Google, the team demonstrates how to let AI compose real, interactive Flutter widgets instead of returning plain text responses.
Key Takeaways
- GenUI lets AI build UI in real time using your registered widgets and brand rules
- AI returns structured JSON that deserializes into native Flutter widgets at runtime
- User interactions feed back to the LLM, creating a generative refinement loop
- Widget catalog acts as contract: AI can only compose from explicitly registered components
- Full working shopping assistant code available with Firebase AI Logic integration
GenUI transforms AI from a text-response feature into a native UX layer that dynamically composes branded Flutter interfaces from natural language prompts.
About This Article
Most Flutter apps that use AI are stuck with plain text responses. Developers end up building chatbots that just dump walls of text instead of creating real interactive interfaces.
VGV built a shopping assistant using Flutter GenUI SDK with Firebase AI Logic. The architecture has three parts: a widget catalog with composable components, JSON deserialization that happens at runtime, and a feedback loop that sends user interactions back to the LLM so it can refine the UI.
The tutorial shows a working shopping assistant that builds real Flutter widgets from natural language prompts like 'Show me running shoes under $150.' There are no chat bubbles. Instead, the AI composes branded product browsing experiences directly from the design system.
