On mobile applications, what is the difference between a session and a visit ?

Unlike visits, sessions include all events that start when the application is launched or brought to the foreground, and end when the application is put in the background for more than 60 seconds or when the application is killed.

A visit is an interaction between a site or application and a visitor who has generated at least 1 event. If no action is performed within a defined period of time (30 minutes by default), the visit ends.