Chatrie v. United States · ¶46

Indeed, Location History records implicate those privacy interests still more than CSLI data because the former is more the individual’s own. Most cell-phone users have no awareness of CSLI records, and anyway would never try to retrieve them. The records are instead the province of wireless carriers, which maintain them for an array of business functions. See Carpenter, 585 U. S., at 301; supra, at 13– 14. Location History information is different. No doubt, Google itself uses those records to improve the quality of its apps. But Google users, too, regularly employ Location History—for example, “to remind themselves of a restaurant they ate at two weeks ago, the time they were last at a friend’s home, the sites they saw on vacation, or the distance they walked on a particular day.” Brief for Google LLC as Amicus Curiae 8. The records thus serve as a personal journal of a user’s…

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