A day after reports surfaced that certain Google apps track your whereabouts even when you turn off location data, experts on Tuesday expressed concerns about the practice, stressing that location and identity data can be used for both good and bad.

The Associated Press on Monday ran a story saying an investigation found that many Google services on Android devices and iPhones store users' location data even if the users explicitly used a privacy setting forbidding that. Researchers from Princeton University confirmed the findings.