It’s in the main Xcode menu at Open Developer Tool > Simulator. Xcode is free and you get it from the app store. The iOS Simulator is an app that comes bundled with Xcode. Plus, it doesn’t cost anything additional beyond your macOS computer. This is an incredibly handy feature of developing responsive sites and testing them on as real of devices as you can. I’m sure plenty of folks know this, but like literally anything else in the world, plenty of folks don’t.
