Beta · v0.1.10 · 485 weekly downloads

The prototyping tool
with no canvas.

Describe what you want. Watch it appear on your device. Native iOS, real haptics, Liquid Glass — no engineering knowledge required.

View on GitHub →

Requires Node 18+ · Xcode (one-time, free) · MIT licensed

How it works

Roadmap

  • Phase 3 — Proto App (physical device)

    Scaffolded

    Custom Expo dev client published as "Proto" for real-device Liquid Glass via QR. Built via EAS Build. Deferred until Phase 2.5 stabilizes.

  • Phase 4 — Web share (prototo.app)

    Planned

    Share a QR code to a stakeholder, they run the prototype on their phone via the web companion at prototo.app.

  • Phase 5 — Graduate to real app

    Planned

    Your Prototo project IS a real Expo SDK 55 app — same app/, screens/, components/ structure as any production Expo app. Graduation path: add EAS Build for distribution, swap placeholder data for real APIs, add auth, ship to TestFlight + App Store.

Start prototyping natively today.

No canvas. No IDE. No engineering knowledge. Just prompts and a Simulator.