Sure there are plenty of foodie sites online like Yelp, Zeer, Dishola and tons more. But how many have actually merged into the iPhone space, the most portable way to figure out what you want to eat? Here are 21 food-related iPhone apps, both free and paid, that will let you eat your heart out: Where (free) – A location-based app that works with Yelp as well as Starbucks. So you can find food and your coffee wherever you are. The app also works with GasBuddy (for the cheapest gas nearby), Eve