Alert (sound/vibration) before "activity" is supposed to start.
It would be helpful for my team to get an alert on their mobile device 15 minutes before an "Activity" is suppose to occur. Sometimes the team gets bogged down during regular work and looses track of the clock. A reminder (like an Outlook Meeting Event) would be of great help.
Bonus points if the manager can toggle if an alert is needed for a specific Activity or not.