Congress is demanding answers from both Apple and Google. Today, a senate panel will question executives about reports that iPhones, iPads with 3G service, and Android phones secretly track and store their users' every move.
Both companies are expected to defend themselves, claiming the tracking devices are not meant to spy on customers, but rather to help them by providing directions to the nearest coffee shop or gas station.
"We have privacy laws for telephone communications, and for electronic mail messaging, but we really don't have modern privacy laws to address some of these modern services," said Marc Rotenberg, Executive Director of the Electronic Privacy Information Center.
It's not just the devices congress is worried about. Lawmakers are also expected to raise questions today about third-party apps, like games, which can keep tabs on customers as well.