Simulator only gets you so far. A prototype that lives in your hand feels different than one on your trackpad — real iOS 26 Liquid Glass, system haptics, real gestures, real one-handed reach. Test it the way your users will actually use it.
You won’t find Prototo on the App Store. It’s a space for your ideas to live before they’re ready for the world — half-formed, in-progress, just for you. That kind of thing doesn’t belong on a public shelf. So we’ll get it onto your iPhone a different way. Takes about two minutes.
Step 1 — Get Prototo onto your iPhone
Open this page on your iPhone if you’re reading on desktop, then tap the button below. It’ll take you to the install page.
Step 2 — Register your device (first time only)
On your first install, you’ll be prompted to set up your device. Tap Register this device and follow the iOS prompt — Settings will open automatically, tap Allow, then Install.
Takes about 30 seconds. You only do this once.
Step 3 — Install + preview your prototype
Back at the install page, tap Install Prototo — the app downloads and appears on your home screen.
Then, in your Prototo project on Mac, run:
npx proto startOpen Camera on your iPhone, point it at the QR in your terminal, tap the notification — your prototype loads in Prototo.
A few notes
- Same Wi-Fi. iPhone and Mac on the same network when previewing.
- iOS 26+. Required for Liquid Glass and other system materials.
- First-time install: ~10–15 min wait after registering, while a fresh build is signed for your device. The Install button activates automatically when ready.