Change your phone settings so Apple, Google can't track your movements
https://phys.org/news/2019-01-apple-google-track-movements.html
The underlying problem is that most people don't understand how tracking really works. The technology companies haven't helped teach their customers about it, either. In fact, they've intentionally obscured important details to build a multi-billion-dollar data economy based on an ethically questionable notion of informed consent.
How consumers are made to agree
