Your app, as a spec anyone can make their own.

    Describe your app once. People get it on their own phone, built the same every time and checked first.

    A spec, not your code

    Look, screens, rules, saved data, journeys and promises, in one JSON file: no source code and no file paths. Open standards: A2UI, CEL, DTCG tokens.

    Built the same, byte for byte

    No AI in the build. Anyone can rebuild a version from its stored spec and compare.

    It has to prove itself

    Your rules’ examples must come out right. With testing on, its tests run in a real browser before a version is kept.

    Publish it

    From an assistant with publish_spec, or on Explore: Publish a spec. Blackbox is MIT: GitHub, npm.

    What's next

    Planned: signing in to your service from your app, and a mark for partners we’ve checked.