Once the setup is done, you will see two automations, "Enable PITA" and the webhook. They are both necessary for the app to work, if you want to delete the app delete "Enable PITA" - it will remove the webhook.
Change the "Record Work" column status to Start/Stop, in order to start or stop recording your work. Once the status changes to gray, the app has successfully recorded the choice. This column works simultaneously for multiple users.