True, but you have to rebuild the app every six or seven days, because it stops working. Unless you shell out for the paid developer account I think. Then your apps won't expire.

My guess is that Apple thinks this route could be used to circumvent the App Store.

Xcode only works on a Mac, and to do it you need to be registered in the Apple developer program.

So if you want to develop an app for iPhone you can do it no problem, as long as you buy another apple device to code it on, pay Apple the subscription fee to join the developer program, and then you can install it on your Apple phone.

That still requires a MacBook. It makes it almost impossible for open source developers to make applications for IOS