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Android developers of 3rd party apps (example: Indeed Job Search) implement Facebook’s Software Development Kit (SDK) This is a collection of tools that eases the creation of software. By using Facebook SDK, developers can do advanced analytics without the need to code it from scratch. Over 61% of Android apps automatically transfer data to Facebook the moment a user opens the app. That means, there is no chance for the app to ask permission from the user to grant/deny the sharing of personal data. This data is harvested from a single person with a single device at a single point.