There's nothing broken here. Unless you do some pretty fancy configuration, the iPhone app will only work when the phone is on your home network. There's no way for the app to "see" into your home network when you're not on it. Fusion works fine on the phone, but runs in the *web browser*, so it will work at home or away. You probably don't want to do all the configuration (port forwarding, dynamic dns, etc.) required to use the app; that's high nerd fu.