Choropleth maps of the difference between the means of connected devices per zone, before and after the launch of Pokémon Go. Top row shows differences at 12:31 PM on business days (a) and weekends (b). Bottom row shows differences at 9:38 PM on business days (c) and weekends (d). The differences are adjusted by zone area, and consider business and weekend days as different groups. A zone with a value of 0 did not show differences between periods.