Geofencing lets your smart home react when your phone arrives or leaves a defined area. It can adjust thermostats, turn lights on, lock doors, or run routines without a voice command.
These steps apply to geofencing features in Google Home, Amazon Alexa, and Apple Home on iPhone or Android.
Does this affect you?
Use this if you want automations based on arrival and departure. The trade-off is that the app needs background location access to work reliably.
Set up geofencing in Google Home
- Open the Google Home app.
- Tap +.
- Choose Set up a routine.
- Create a new routine.
- Under Starters, tap Add starter.
- Choose Location.
- Select You arrive or You leave.
- Confirm the home address and radius if offered.
- Add actions such as lights, thermostat, or lock commands.
- Save and grant location permission when prompted.
Google treats this as a location-based starter inside a routine rather than a separate geofencing menu.
Set up geofencing in Amazon Alexa
- Open the Alexa app.
- Tap More.
- Tap Routines.
- Tap +.
- Under When this happens, choose Add trigger.
- Tap Location.
- Choose Arrive or Leave.
- Confirm the address and radius.
- Add the smart-home action.
- Save the routine.
- Set phone location permission for Alexa to Always if your phone offers that option.
Alexa needs background location access. While Using the App is often not enough for reliable arrival and departure triggers.
Set up geofencing in Apple Home
- Open the Home app.
- Tap +.
- Choose Add Automation.
- Tap People Arrive or People Leave.
- Select which household member triggers the automation.
- Choose the accessories and actions.
- Tap Next.
- Tap Done.
- Confirm Location Services are enabled for Home in iPhone privacy settings.
Apple Home can base automations on one person, anyone arriving, or people leaving depending on your Home settings and household members.
Privacy, battery, and household logic
If geofencing fails, check location permission first. Modern phones handle geofences efficiently, but running several smart-home apps with background location can still affect battery.
For shared homes, use first person arrives or last person leaves logic when available so lights or thermostats do not change just because one person left while others stayed home.
If background location tracking bothers you, remove the location starter and use a manual, schedule, sensor, or voice-triggered automation instead.
Sources
- Google Nest Help – Set a location-based starter for a routine (2025)
- Amazon Alexa Help – Use location-based routines (2025)
- Apple Support – Create an automation based on your location in Apple Home (2025)