To avoid disturbing your customers, there is a feature in Detrack that will permit the sending of SMS / text notifications during a specified time range.
This tutorial will show you the steps to allow SMS messages to be sent out in the time range of 8 am to 10 pm. SMS notifications out of the defined time range will be suppressed, and not be sent out.
Navigate to Settings > Notifications > Notification Settings.
Click on Add Notification or any of the rows to open a pop-up.
Click on the Text / SMS tab.
Enter the values into Time window start and Time window end.
Click Save when done.
Thereafter, the Text / SMS for this event will only be triggered within the given Time Window; the notifications will not be sent out of the define Time Window.