The Day

Google tracks your movements, like it or not

- By RYAN NAKASHIMA Technology Writer

San Francisco — Google wants to know where you go so badly that it records your movements even when you explicitly tell it not to.

An Associated Press investigat­ion found that many Google services on Android devices and iPhones store your location data even if you’ve used a privacy setting that says it will prevent Google from doing so.

Computer-science researcher­s at Princeton confirmed these findings at the AP’s request.

For the most part, Google is upfront about asking permission to use your location informatio­n. An app like Google Maps will remind you to allow access to location if you use it for navigating. If you agree to let it record your location over time, Google Maps will display that history for you in a “timeline” that maps out your daily movements.

Storing your minute-by-minute travels carries privacy risks and has been used by police to determine the location of suspects — such as a warrant that police in Raleigh, N.C., served on Google last year to find devices near a murder scene. So the company lets you “pause” a setting called Location History.

Google says that will prevent the company from rememberin­g where you’ve been. Google’s support page on the subject states: “You can turn off Location History at any time. With Location History off, the places you go are no longer stored.”

That isn’t true. Even with Location History paused, some Google apps automatica­lly store time-stamped location data without asking. (It’s possible, although laborious, to delete it.)

For example, Google stores a snapshot of where you are when you merely open its Maps app. Automatic daily weather updates on Android phones pinpoint roughly where you are. And some searches that have nothing to do with location, like “chocolate chip cookies,” or “kids science kits,” pinpoint your precise latitude and longitude — accurate to the square foot — and save it to your Google account.

The privacy issue affects some two billion users of devices that run Google’s Android operating software and hundreds of millions of worldwide iPhone users who rely on Google for maps or search.

Storing location data in violation of a user’s preference­s is wrong, said Jonathan Mayer, a Princeton computer scientist and former chief technologi­st for the Federal Communicat­ions Commission’s enforcemen­t bureau.

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