I feel common people will become more aware of their health problems. I also think it will somehow improve quality of life for patients with diabetes and hypertension. But I don't see this as a medical revolution. Suppose many doctors will regret it sometimes, as there will be even more anxious patients with a complaint habit: "This app told me I have lupus, please help!"
"Heart rate, calories burned, blood sugar, cholesterol" - you cannot simply translate everything that happens in a human body into these simple criteria, like the ancient Chinese who diagnosed most diseases by pulse reading. It's all much more complicated, and you'll need real doctors to diagnose and treat you.