iPhones get better video calls, paid privacy protection and virtual driver’s licenses in iOS 15

First, it’s taking all that historical data and trying to makes sense of it with trends, comparing changes in activity and vitals over time. It will look at things such as your resting heart rate, blood glucose, sleep patterns, and steps to detect long-term changes. Then, it will notify you that, hypothetically, you haven’t moved as much in the past 15 months.