This applet uses group location to trigger a voice monkey when the last person in the group leaves, but not if anyone is still home. This can be used to trigger Alexa routines that turn off lights, etc.
If
Last member exits an area
This trigger fires when the final member exits an area, meaning all members have left the area.
Then
Trigger Monkey (Routine)
This action will trigger the Monkey you specify including any parameters you set. Use it to trigger Alexa routines!
Explore more great ways to automate Group Location and Alexa Voice Monkey