In this March 17, 2015 photo, 81-year-old Bill Dworsky holds his pill container with a motion sensor attached at his home in San Francisco. Each time Bill or his 80-year-old wife, Dorothy, opens the refrigerator, closes the bathroom door, or lifts the lid on a pill container, tiny sensors in their home make notes on a digital logbook, which their son Phil Dworsky monitors daily on his smartphone. (AP Photo/Eric Risberg)