I am working on creating an app for people with type2 diabetes.

They only need to take the picture of the food they are about to eat and the app will tell approximate range of how many points their blood sugar can rise. For example, if you take a picture of an apple, it can tell that eating a full apple will increase blood sugar by 5-15 points. Its a range because it depends on the quantity and the individual insulin resistance level. Its better than being blind to numbers and poking with needle every day.