Ask HN: mini scale with mobile phone to learn food portion sizes

We are thinking of building a mini scale that would be able to communicate with an iPhone or Android for people to learn portion sizes.

Our doctor contacts at UCLA tell us that the number one thing most of their patients get wrong is portion control that most don't know how much 2 oz of pasta is and 3 oz of meat is.

How our scale/app would work is we would have a training game for people to weigh pasta and meat so people can have an idea of good baselines.

Lastly, people can weigh their plate (before and after) to see how much they ate and with some food description, we would be able to tell them if they ate too many carbs, etc. So we could say that you ate two servings too many of noodles in a meal if it is weighed.

We are thinking we can build the scale the size of a bluetooth headset for reference point.

Ideas or opinions from the hn community?