StemJSON is a declarative JSON-based language that turns descriptions into native mobile apps, written by AI, pushed by your backend or shaped by your users. The format is open and ships with StemStudio AI and an MCP server so features can be generated from an AI chat.
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Describe a screen and have an AI produce StemJSON that renders as native UI and logic.
Ship new mobile features without an app store release.
Drop the format into existing tooling, IDEs or prototyping environments.
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