To enable this feature go to the Administration tab and select the option "Manage Clock In/Out By Times" in the Staff section.
Once inside, tick the checkbox to Enable Clock In/Out By Times and set your times for Clock In and Clock Out. Here is an example:
Employees on this company are supposed to clock in by 9 AM and clock out by 5 PM, so if someone hasn't clocked in by 9, they will get a message like this:
And if it's already 5 PM and they haven't clocked out, they will see this:
Nice and simple, right? Let us know your thoughts in the comments sections or if you need more information.