When im in phone or tablet and i hit the cook button it helps by telling you which ingredients i'm using in that step, but it actually just looks for the same name, as an example: if the step call for soy sauce and in the ingredient lists there are several items with sauce in their name (Worcestershire sauce, tomato sauce, fish sauce) it will say to use all of those in the same step. Even if it needs to be use further, and it will do the same when later with other ingredients.