Connecting iPhone to Telemetry Kit


i want to tune up my copter with a Ardupilot Kit. There I want to connect my iPhone to the Telemetry Kit in order to use it as ground station. I’ve seen that there are two different possibilities: Bluetooth and Wifi. So i have some questions:

  1. What do i need for the bluetooth-connection and where can i get such a Bluetooth to telemetry bridge? In an older Post there was one but it isn’t yet in your store.
  2. What do i need for the WiFi-connection an where can i get such a Wifi to telemetry bridge?
  3. What are the advantages of each possibility and what are the negatives?

Thanks for your help.