IOS Simulator app is used to run your iOS app on a Mac. I’ve been developing a lots of designs specifically for the iPad and iPhone. So particularly I needed this app to test my app's user interface.
To run this IOS simulator on the mac, first of all you must install Xcode application from the App Store. Once installed open up your Applications folder and scroll down to it.Right click and select “Show Package Contents”. Follow the folder path below to get to the IOS simulator
Content => Developer => Platforms => iPhoneSimulator.platform => Developer => Applications => iOS Simulator
This app provides several ways to interact with it by using the keyboard and mouse to simulate taps, device rotation, and other user actions.
"But what for Windows and Lunix? I am a window user and I want to create a app for IOS device"
If you are a Window or a Lunix user, there is no IOS simulator but there is something else to replace this software.
Browser Stack tool allows you to officially run IOS simulator directly in your web browser.
Just go to their website, Create a account and choose IOS as the platform. After that put the website URL in the input box and choose an IOS device, and start designing. You can choose between different versions of IOS to choose from.