“People have used magnetic compasses to find their way outdoors for centuries. In a twist, a startup has found a way to use the magnetic sensors in smartphones to locate people themselves—this time, indoors, where GPS signals don’t normally reach.”
“People have used magnetic compasses to find their way outdoors for centuries. In a twist, a startup has found a way to use the magnetic sensors in smartphones to locate people themselves—this time, indoors, where GPS signals don’t normally reach.”