About App Trackers What are app trackers? You’ve probably heard about companies like Google and Facebook tracking you behind the scenes on third-party websites. But did you know they also track your personal information through apps on your device? Over 96% of the 100 popular free Android apps we tested contained hidden third-party trackers. Of those, 87% sent data to Google and 68% sent data to Facebook. This happens even when you’re not using your device. Trackers in apps may have access to a lot more information than their website tracker cousins, such as your location down to which floor of a building you're on, how often you play games while at work, and when and how long you sleep each day. Even if you don't have a Google or Facebook account, for example, they can still collect data about you from your apps.
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