Food apps are a huge part of any app store. You can find restaurants with Yelp, share photos with Foodspotting, check the sustainability of your fish with Seafood Watch, read any of a million cookbooks—but we wondered what the experts do with their phones. So we asked six food experts—including chef Wylie Dufresne of wd~50, and the bar manager of the most exciting, cutting-edge cocktail bar in New York—what food-related apps grace their phones.