How to Set ecobee Geofence Radius for HomeKit Authored by: Support.com Tech Pro Team
1. Introduction This guide will show you how to configure the Geofencing feature of your Apple HomeKit platform. With Geofencing, you can set location-based triggers to activate HomeKit Scenes when arriving or leaving your home.
Tools You'll Need:
No extra tools are needed.  --> 
Supplies You'll Need:
No extra supplies are needed.  --> 
Before You Begin:
Ecobee and Apple HomeKit should be connected 
2. Configure HomeKit Geofence To Configure the Geofence Launch the ecobee app . Go to the Menu  in the top left. Then go to Manage HomeKit . Select Geofence . Turn the switch next to Enable geofence  to the On  position. Set the geofence radius  by doing a pinching or stretching motion on the touchscreen to decrease or increase its size. Select a Scene that is triggered (or choose to do nothing) when you enter the geofence  boundary. Select a Scene that is triggered (or choose to do nothing) when you leave the geofence  boundary. Tap Done  in the top right to save your settings.