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Documentation Index

Fetch the complete documentation index at: https://bilt.me/docs/llms.txt

Use this file to discover all available pages before exploring further.

Bilt streams a live iOS simulator directly to your browser. You see your app running on a real iOS environment as it’s being built — no Mac, no Xcode, no local setup.

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How it works

When you create or update a project, Bilt spins up a cloud development sandbox that builds your app and runs it in an iOS simulator. The simulator output is streamed to your browser in real time via WebSocket. You interact with the preview just like a real phone — tap, scroll, navigate between screens, and test your app’s full flow.

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What you get

  • Real iOS simulator — Not a mockup or screenshot. A running instance of your app on simulated iOS hardware.
  • Instant updates — Each chat message rebuilds the app. Changes appear in the simulator within seconds.
  • No local setup — Everything runs in the cloud. Works from any browser on any OS.
  • Shareable — Send a preview link to anyone. They can see and interact with your running app.

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Preview during development

The simulator is always visible alongside the chat interface. As you describe changes, you can watch the app update live:
  1. Type a message — “add a tab bar with Home, Search, and Profile tabs”
  2. The AI writes the code and triggers a rebuild
  3. The simulator refreshes with the new tabs visible
  4. Test the navigation and send follow-up instructions
Every project gets a shareable preview URL. Anyone with the link can view and interact with your app — useful for:
  • Stakeholder reviews — Share with clients, investors, or teammates
  • User testing — Get feedback on flows before publishing
  • Bug reports — Share the exact state someone else can reproduce
See Project Sharing for more on collaboration.