How to Use the Heart Rate App
As you know, the Apple Watch has a built-in heart rate monitor that tracks your heart rate and records this data on an ongoing basis while you wear the watch. This data automatically transmits to the Health app on your iPhone, where it is stored. Thus, if you want to refer to your changing heart rate over time, you can find this information in the Health app, or use a third-party app that imports the data (with your permission).
The easiest way to launch the Heart Rate feature on the Apple Watch (while you’re wearing it) is to wake up the watch, display the selected watch face, and then swipe up on the screen to reveal the glance screen. Swipe horizontally until the Heart Rate screen appears (see Figure 5.31).
FIGURE 5.31 The initial Heart Rate screen on the Apple Watch.
When you activate the Heart Rate screen, the last recorded heart rate appears for a few seconds, until the watch can get and display a current heart rate, measured in beats per minute or BPM (see Figure 5.32). On the Apple Watch, this is the only information that appears for this feature.
FIGURE 5.32 It takes a few seconds for the Heart Rate monitor to display your current BPM rate.