Wireless reversing camera to iPhone?

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I'm looking to add a discreet reversing camera to my car. We have US sized plates so I was initially drawn to the pearl auto system which has an app so the camera (in the plate holder) streams to your phone. Great idea, but not $500 great!

I then found some wireless garmin cameras which would make for a very discreet installation but they only stream to a garmin device. I live in Dubai with absolutely zero need for satnav.

Is there a product available which can do what I want?