A:AnswerI attached the link to it in the recomendations below, you can check it out for yourself.
It is not currently compatible with the iPhone, only Android.
A:AnswerNikon WU-1A wireless adapter is compatible with the D3200. The WU-1A wireless adapter enables the camera to wirelessly transfer photos and videos (android only) from the camera to an Android or Apple Inc smart device running Nikon WMU application. You can also received a live feed of what the camera is viewing and control the camera shutter from your apple or android device. The setup instructions and usage information is within the WMU app which can be downloaded for free from your smart device application store: apple app store, or google play store.
A:AnswerNikon current and recommended flashes for the D3200 are SB-700 and SB-910. Other Nikon flashes such as SB-600, SB-800, SB-900, SB-300, SB-400 and R1-C1 wireless Close up speedlight system etc are also compatible with the D3200.