Facebook provides a suite of turnkey app-building tools for Android that are widely used among the most popular Google Play apps, with billions of combined installs; naturally, these tools create incredibly data-hungry defaults in the apps that incorporate them, so that even before you do anything with an app, it has already snaffled up a titanic amount of data, tied it into your Google Ad ID (which is recycled by Facebook to join up data from different sources) and sent it to Facebook.