Xcode
Software
Running the iPhone Duo simulator to test the app
"The next app that you're going to need is Xcode, and this is going to allow us to test it on a simulator for the iPhone Duo."
More source quotes
Running an iPhone simulator on Mac to test and preview iOS apps built with Cursor
"When you have a simulator running on your computer and you get the simulator by downloading Xcode, you can press Command S and this will automatically take a screenshot."
iOS app development and testing
"You're going to need Xcode. And Codeex can actually connect to Xcode"