https://techcrunch.com/2020/04/14/apple-opens-access-to-mobility-data-offering-insight-into-how-covid-19-is-changing-cities/

Apple is providing a dataset derived from aggregated, anonymized information taken from users of its Maps navigational app, the company announced today. The data is collected as a set of “Mobility Trends Reports,” which are updated daily and which provide a look at the change in the number of routing requests made within the Maps app, which is the default routing app on iPhones, for three modes of transportation including driving, walking and transit.

Apple is quick to note that this information isn’t tied to any individuals, since Maps does not associate any mobility data with a user’s Apple ID, nor does it maintain any history of where people have been. In fact, Apple notes that all data collected by maps, including search terms and specific routing, is only ever tied to random rotating identifying numbers that are reset on a rolling basis. This anonymized, aggregated data is collected only to provide a city, country or region-level view, representing the change over time in the number of pedestrians, drivers and transit-takers in an area based on the number of times they open the app and ask for directions.