Stores Sniff Out Smartphones to Follow Shoppers

Indoor location technology brings Internet-style tracking to physical spaces.

You’ve just tossed a jar of peanut butter in your grocery cart when your smartphone buzzes. You glance down at the screen to see a message that seems downright clairvoyant: Buy some jelly. Get $1 off.

Convenient? Certainly. Creepy? Maybe.  Continue reading →