http://sls.iykpqm7jiradoeezzkhj7c4b33g4hbgfwelht2evxxeicbpjy44c7ead.onion/technologies/real-time-location-tracking
Developers can add bits of code called “software development kits,” or SDKs, from location brokers into their apps. Once installed, a broker’s SDK is able to gather data whenever the app itself has access to it. Sometimes that means access to location data whenever the app is open. In other cases, it means “background” access to data whenever the phone is on, even if the app is closed.