Time in App
IntermediateTime in app is the total amount of time a user kept the product open and active within a defined period.
It is normally computed by summing the durations of that user's sessions, and the quality of the number depends entirely on how the tool closes an abandoned background tab. Two products can raise the figure with opposite meanings: on a social network more time signals appeal, while on a payments back office more time means people are stuck. Time in app is therefore not a health metric on its own and should be read next to task completion.
How it is calculated
Time in app = sum of the durations of all sessions of one user in the selected period
Session duration runs from the first to the last event of the session, so the time after the final event is not counted and a single-event session registers as zero. The unit is minutes or seconds, and for a group the median is usually reported instead of the mean because the distribution has a long tail.