Fog Data Science — Fog Reveal (location-data broker) — vendor profile

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A point-and-click web app that lets police search commercial smartphone-location data pulled from mobile advertising IDs across 700+ apps — draw an area to see every device that was there, or track one device's 'pattern of life' — often with no warrant, for roughly $6,000–$9,000/yr. An EFF/Associated Press investigation confirmed contracts or trials with at least 18 state and local agencies; records showed some agencies did not believe Carpenter v. U.S. required a warrant for app-derived location data. National shared plate database: YES (effectively) — Fog claimed access to 250M+ US devices and 15B location signals/day from the ad-tech marketplace.