Nom Nom Paleo provides you with paleo recipes with over 1800 photos. The foods are sortable by category and searchable by ingredients. Instructions, including tips, shortcuts, and information about food and techniques are included. The app can even help you shop. It is one of the better virtual cookbooks around,especially for those following paleo-type diets.
More paleo diet apps: http://www.iphoneness.com/iphone-apps/iphone-apps-for-the-paleo-diet/