What do your apps know about you?

Millions of people to tried to cheat on a spouse through the ashleymadison.com Web site. Their data was hacked and published last summer. When we looked at the data, we found that almost none of the site’s users had turned off geolocation on their devices. Ashley Madison users are easy to map, and map very precisely. We’re not going to publish that map, but it should make you think twice about the location apps on your phone.

• What a map we can’t show you tells you about your phone’s location settings