Sparkflow

Sparkflow turns an idea into a native mobile app that checks its own work. Write a sentence, drop a paper sketch or a screenshot, or just say it: Sparkflow returns a real Expo / React Native project, running natively on the iOS Simulator and the Android emulator, verified screen by screen. The problem: I was a founding engineer at a social app used by a few million people. Ideas took days to become real screens: mockups in one tool, code in another, and endless back and forth between designers and engineers. Sparkflow is one place where designers and engineers shape a mobile app together. How it works: an agentic loop powered by Meta's models. Muse Spark plans the app (pages, links, acceptance criteria), SAM 3.1 segments a sketch into UI regions, Muse Wonder writes the React Native code, then Sparkflow opens the app, screenshots every page in light and dark mode, and Muse Spark checks each screen against its criteria and sends what fails back to be fixed, until every page passes. Then you keep iterating in a visual IDE: every page on one canvas, the live simulator, the source and layout tree of the page in view, and point-and-talk editing (select an element, type or dictate with Muse Voice Transcribe what to change). Muse Image generates app icons and images. You can share a project with a link, Play it on iOS, Android or the web, and Ship it to the App Store and Play Store through fastlane. It's live and anyone can try it, free: https://sparkflow-ai.web.app runs each app in a cloud sandbox (EU and US), or connects to your own Mac for the local simulators.