What is the objective of the pivot? Cash? Users? Pictures? Something else?
In other comments, people are saying the iPhone app is important. I think they already know this, and what would be more interesting to them is any shortcuts they could take to build their iPhone app.
I think they ought to find an iPhone developer who has developed an app similar to what would be needed for eat.ly, and is in a similar position where they are enthusiastic about startups but not doing it full-time.