> "The company purchases cell phone location data from advertisers who in turn get the information from embedded software development kits (SDK) in commonly used phone applications. The publishers of apps frequently allow third parties to insert SDKs into their apps for a fee. Some of the apps have Anomaly Six’s own SDK embedded in them. This system often relies on disclosures in the complex terms of service that must be agreed to in order to use an application. Most apps' privacy policies do not disclose whether or not SDKs are embedded in their product."
https://en.wikipedia.org/wiki/Anomaly_Six
Okay, now we need a lawyer to find the explicit legal language in the terms of service agreements that give the necessary legal cover to the app manufacturer and distributor to install SDKs...