Prototo Desktop puts the whole product in one window. Your coding agent on the left (you pick Claude Code or Codex during setup). A live iPhone on the right. Record, Preview, and Publish buttons up top.

Download Prototo for Mac , open it, and create a project. That is the setup.

Prototo Desktop (one window)
 ├── Agent terminal     ← the design tool (left pane)
 ├── live iPhone        ← the canvas (right pane)
 └── Record · Preview · Publish   ← record a clip, phone preview, share a link

Describe a screen in the terminal. Watch it appear on the iPhone beside it. Click Preview to scan a QR and hold the prototype on your real iPhone while you build, no publish needed (how it works). When it looks right, click Publish for a link anyone can run natively on their iPhone with the free Prototo app, or Record to send a clip to Studio.

The app keeps everything else out of sight: it starts Prototo for you, opens the Simulator hidden, and reconnects your last project when you come back.

The paradigm stays clean: one prompt surface, one output surface. You never context-switch between design tools.

Prefer raw Terminal windows? The old flow still works: see the terminal flow.