The Health Tracking Graph application tracks health data you already have in your phone. Health Tracking Graph uniquely lets you look at long term trends. Even more powerful is your ability to compare different data sets. For example watch how carbohydrates affects your weight. For people with more serious health problems there is additional help.
Health Tracking Graph lets you look at how your Diabetes can be impacted by your diet. Compare your glucose levels to your macronutrients like Fiber, Protein, and Fats.
If you have High Blood pressure see how your levels are impacted by Diet as well. Compare how it changes over time based on changes in your diet.