Weight loss app

I am a weight loss coach and would like to create an app for my clients to use to monitor their results. with a graph showing their weight drop, taking measurements including photos to compare. It would also need to include an allowable food list, with it's portion size and if it's counted as a fat, protein or vegetable. I would also like it to calculate fat, protein and vegetable when they enter a recipe.
I would require you to create the graphic for it.