Don't expect to have a fully functional iOS device because it doesn't work like that. Furthermore, they don't work 100% perfectly as they're simply recreations that only offer us a few options.
You can't install any new ones, although some have been specially designed for this simulator. Once you install this program, you'll have access to the typical iOS interface with its Home and shortcut icons to the different apps. Therefore, its functions are rather limited and really, it can only be used to satisfy our curiosity in the case that you've never seen a functional iPhone or iPad before. We have to point out that it's a simulator, not an emulator. IPadian is an iOS simulator for Windows that you can use try out different functions of Apple's mobile operating system on your PC.