It can be done (as long as you build your app specifically for the simulator of course), but it's not something they designed it to do. I forget the exact folder and all, but if I remember right, the app is stored somewhere in the Development directory; just look for a folder with "Simulator" in the name. You also might be able to use the version in the Library folder, but I'm not sure of that, as that's a virtual file system of the Simulator itself. And of course you'll have to point the person at where they can run the Simulator directly, as there won't be a way to run it from XCode.