The Due Time app adds a 'Due time' (and 'Timezone') field to the 'Due date' field. Use triggers to define what should happen at the exact time the ticket is due.
The time is added by entering it as part of the ticket field information on the left of the screen.
At the point a due time hits, you can define what you want to happen to the ticket using triggers. If you need to change the priority, ticket status or any other ticket field, that's not a problem! If you want to email the assignee, assigned group or even the requestor, this is all doable.
When the due time hits, the assignee will also see an optional popup notification at the top right in Zendesk.
The in-app 'workflows' functionality allows you to set things to happen relative to a due time. Maybe you need to be reminded 1 hour before a due time hits? No problem!
In addition to being able to perform any ticket action at, before or after a due time, those actions can be dependent on ticket conditions. For example, if a due time hit on a ticket, 24 hours passed and the ticket was not yet solved, you could set it to escalate the ticket's priority to urgent and notify the assigned team by email telling them to take action.
Since the due time app stores the time on ticket fields in Zendesk. This allows you to create views, macros and reports using native Zendesk functionality.
SweetHawk has been building apps for Zendesk since 2015. Their first app, Calendar, was installed by dozens of businesses within weeks of release which inspired them to create more apps like Tasks, Reminders and Notify, creating a Super Suite of apps all complimenting each other to address larger use cases such as ITSM change management, project management and HR process automation. Today, well over 100,000 agents use SweetHawk apps for Zendesk every day.