Get Prototo.
Build it on your Mac. Send it to any iPhone, where it runs natively.
For building and publishing
Prototo Desktop.
Describe your app to Claude or Codex and watch it build live in a real iOS Simulator: one window, no setup after the first install.
macOS on Apple Silicon · needs Claude Code or Codex + Xcode
For sharing and viewing
Prototo Viewer.
This is the part nothing else can do. Send anyone a link and your prototype runs native on their iPhone. Real gestures, real haptics, the real thing. Free to download, free to view.
Get it on the App Store
iOS 26 or later