I got a .app folder from a developer friend.
I would try his application and run .app to my iPhone Simulator, without XCode.
Is there a way to run this .app to my iPhone Simulator ? Of course this .app has been built for iPhone Simulator target.
Try something like this:
/Developer/Platforms/iPhoneSimulator.platform/Developer/Applications/iPhone\ Simulator.app/Contents/MacOS/iPhone\ Simulator -SimulateApplication path_to_your_app/YourFavouriteApp.app/YourFavouriteApp
来源：https://stackoverflow.com/questions/7362852/iphone-run-app-to-iphone-simulator