When the app is installed you install Issue history Collector (cloud), you can monitor the tickets history, age, and assignees in the tabs inside the Activity section. The following tabs are available in your Issues Activity panel:
User/Status Statistics
User/Status Statistics Issue Statistics tab displays how long each user worked on the ticket when it was in each of the statuses.
Status/User Statistics
Status/User Statistics Issue tab tab displays how much time was spent on a ticket by user consolidated by each user. This tab displays the same information but it's grouped by ticket statuses.