Food Intolerances is a US$5.99 universal app designed to help those whose diet is restricted by a food allergy or intolerance. It is believed that up to 15 million Americans have food allergies. Food intolerance doesn't involve the immune system, but is a strong adverse reaction to a particular food. Many people have these issues but don't really know what is triggering the reaction.
You can use Food Intolerances to search foods by category, like Meat, Dairy Products or Fish; or search by name. Each item provides details of its composition, like lactose, fructose/glucose ratios, Histamine content and food additives among other details. While the app does not rate specific brands of food, there is enough information to get a pretty clear picture of what foods may be problematic.