Not to use geofencing via the Homey Build-In option. There are already several threads available for alternative geofence options, please use the search option.
If you use a Shelly you will have WLAN in the area. With the SmartPresence app you can also activate flows as soon as the smartphone logs into your home WLAN.
If you have a Ubiquiti UniFi Router you can also use the app of the same name.
