How Does it Work? - Fitness Trackers

Sarah explores her new fitness tracker, learning about its sensors and capabilities. The device uses photoplethysmography to measure heart rate and an accelerometer for activity tracking. It also monitors sleep patterns using movement and heart rate variability. Data is synced to an app for analysis, providing insights and trends. Sarah ensures her data privacy is protected, appreciating the technology's complexity and utility.

In what way does the app connected to Sarah's tracker analyze her health data?

Why is it important for Sarah to understand the privacy settings of her device?