Each time 81-year-old Bill Dworsky 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 San Francisco home make notes on a digital logbook.
The couple’s 53-year-old son, Phil, checks it daily on his smartphone. If there’s no activity during a designated time, the younger Dworsky gets an automated email, so he can decide whether to call or stop by. “This is peace of mind, really,” he says of the system he installed last year.