Tech

摘要

Tech-savvy parents have spent years using cell phones, those ultimate tools of adolescent aloofness, to snoop on their kids. Now, thanks to a series of sleek, smart new apps, that fringe practice is going mainstream-with a vengeance. Recently, the Life360 smart-phone app, which taps GPS technology to provide real-time info about family members' whereabouts, logged its 20 millionth download.