[FoodCoach]

I had the same goal and developed FoodCoach (TheFoodCoach.app). It tracks nutrition (not calories) based on a picture of a grocery store receipt.

The high level goals are to increase protein, increase fiber and decrease sugar. Super simple. Tracking takes <5 minutes per week, for the entire family. With the receipt it recommends foods to buy more or buy less to help the user hit their protein, fiber and (low) sugar goals.

I used no-code Appgyver and have been very disappointed in its robustness. The backend is all hooked up. Everything works, but I've learned I'm not good at marketing. There many better (and free) sources of information to obtain nutrition data.