The U.S. military is buying the granular movement data of people around the world, harvested from innocuous-seeming apps, Motherboard has learned. The most popular app among a group Motherboard analyzed connected to this sort of data sale is a Muslim prayer and Quran app that has more than 98 million downloads worldwide. Others include a Muslim dating app, a popular Craigslist app, an app for following storms...

... Motherboard uncovered two separate, parallel data streams that the U.S. military uses, or has used, to obtain location data. One relies on a company called Babel Street, which creates a product called Locate X. U.S. Special Operations Command (USSOCOM)... bought access to Locate X to assist on overseas special forces operations. The other stream is through a company called X-Mode, which obtains location data directly from apps, then sells that data to contractors, and by extension, the military.

... The apps sending data to X-Mode include Muslim Pro, an app that reminds users when to pray and what direction Mecca is in relation to the user's current location... (After publication of this piece, Muslim Pro said it will no longer share data with X-Mode).

Some app developers Motherboard spoke to were not aware who their users' location data ends up with, and even if a user examines an app's privacy policy, they may not ultimately realize how many different industries, companies, or government agencies are buying some of their most sensitive data. U.S. law enforcement purchase of such information has raised questions about authorities buying their way to location data that may ordinarily require a warrant to access. But the USSOCOM contract and additional reporting is the first evidence that U.S. location data purchases have extended from law enforcement to military agencies.

X-Mode told Motherboard in an email that the company "does not work with Sierra Nevada or STR" but did not deny they were once customers... "X-Mode licenses its data panel to a small number of technology companies that may work with government military services, but our work with such contractors is international and primarily focused on three use cases: counter-terrorism, cybersecurity and predicting future COVID-19 hotspots."