This app lets you search for any food or product. You will then get the amount of proteins, calories, vitamins etc it contains. You can also scan the barcode of a product to get the result directly. Oh, and it is completely free.
Can't I just get it on an easy-to-use website?
I would argue that it is easier to have it in the app. You get streamlined info and can compare products. Not to mention the super fast barcode scanner you get in the app.