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