Apps for Product Identification and Directions

I use Digit Eyes for both of those applications. It will recognize the bar code on a product, and then give you information such as name, ingredients, and usage instructions.

I agree with the previous commenter that Digit Eyes is great for doing this. Not all bar codes will give you instructions on how to make meals or put things together. I use KNFB Reader for this. It reads ingredients but sometimes doesn't have the right amounts for this.
Hope that helps