A patient checks her blood sugar with a continuous glucose monitor that sends readings to her phone, the data analyzed by an algorithm that recommends insulin adjustments. Her physician reviews the same data remotely, discussing trends in a video call that replaces an office visit. A mental health app guides a man through cognitive behavioral therapy exercises at midnight when his anxiety peaks and no therapist is available. A smartwatch detects an irregular heart rhythm and alerts its wearer to seek medical attention, the early warning potentially preventing a stroke.