How apps access your private information

Have you ever wondered how Google tracks where you are? How about what those terms and conditions mean when you access free Wi-Fi?

As scary as it sounds, your smartphone’s apps share a lot of the private information on your device with marketing agencies, phone operators and other private companies. But where does all that data go? And what happens to it?

AJ+ and the interactive documentary series “Do Not Track” investigate. Watch the four-part series below.