Apple's Health app can tell you how many flights of stairs you've climbed or steps you've taken, your cycling distance, calories, weight, and, starting with iOS 13, how often your headphones were too loud. Sorting through all that data could be daunting, but the Summary tab can be customized to show only what you want to see: simply go open the Health app, tap the Summary tab, tap Edit in the top right corner, and then select the kinds of data you want to see in your summary. More health minded? With a HealthKit accessory, you can track your resting heart rate, blood pressure, and respiratory rate. Looking to focus on nutrition? The Health app can show your nutrients including sodium, fat, carbohydrates, and fiber. Choosing which of all these metrics to view is easy! Let me show you how.