WhenToHelp Lite is set to let helpers add their own time off without needing coordinator approval. If you have a paid subscription you have the option to require coordinator approval for all time off requests (which can be changed in the SETTINGS>Global Helper Permissions page). The Time Off Request is then sent to the coordinator to be approved or rejected.
The Coordinator can be notified, by email, of the pending request and sees the alert "X Pending Time Off requests" in their "What's New" section on the home page or at the top of most other pages. Clicking that link takes you to the Pending Time Off page where you can see the days and times that they are requesting off and a list of any shifts that would be affected.
To Approve or Reject a Time Off request: