Xcode allows you to live preview your iOS views using Xcode Previews, so you can see how the app appears as you're actively developing it. Here's how to use them.

Xcode 15 allows you to preview your iOS app's user interface as you build it. Here's how to use it to see how your app appears to users.

There's no longer a cost to push apps from Apple's IDE to an iOS device; no developer program membership is needed. Sideloading isn't an Android-only function thanks to Xcode 7.