www.wsj.com/articles/u-s-government-contractor-embedded-software-in-apps-to-track-phones-11596808801
“Anomaly Six LLC a Virginia-based company founded by two U.S. military veterans with a background in intelligence, said in marketing material it is able to draw location data from more than 500 mobile applications, in part through its own software development kit, or SDK, that is embedded directly in some of the apps. An SDK allows the company to obtain the phone’s location if consumers have allowed the app containing the software to access the phone’s GPS coordinates.“