Smartwatches and wearable medical devices help people monitor their health 24/7. Their impact could increase if doctors trust their utility and people feel their data is secure

Advances in sensors and artificial intelligence (AI) are helping millions detect and manage chronic health conditions and avoid serious illness on devices small enough to be worn on a wrist or penny-sized patch. Deloitte Global predicts that 320 million consumer health and wellness wearable devices will ship worldwide in 2022 (figure 1). By 2024, that figure will likely reach nearly 440 million units as new offerings hit the market and more health care providers become comfortable with using them. These numbers include both smartwatches, which are marketed to and purchased by consumers, and medical-grade wearables—typically called “smart patches”—which are often prescribed by health care professionals but are increasingly becoming available off the shelf.