Potentiometer and relay control via wireless with Arduino

Good Evening, I'm new in Arduino World. I have project electric and hybrid motor for boat and now I'd like to expand the optionals with the remote control by IPad app. For these I have need to control two relay and a potentiometer with Arduino via wireless with an IPad application.

What do you suggest ?

Thank very much for your answers

Aren't there any suggestion for my project?

Hi, I try to Do something the Same. Ipad, arduino and Control a boat. I have a arduino mega, wifly shield and an iPad. I can Control a servo and some LEDs, the amount can easely be changed. A Prototyp is working, but did not Do any distance Tests. The App is Stil not that what i want. Take a Look at the App store, you will find the arduino Manager. May be enough for your needs Willem