Build a screen layout in ServeFireUI Studio for Mac, share it as a link, and open it on iPhone — the design runs natively, before you build a full app.
Already installed? Re-tap your preview link from messages.
Compose screens with a tree, palette, inspector, and live sim canvas. When you're ready to try it on device, share it — every viewer gets a private, temporary copy of the data.
Real SwiftUI controls, real keyboard, real navigation. Each viewer gets their own private sandbox, so the data you enter only lives in your copy of the preview and never collides with anyone else's.