A geofence is a virtual boundary that can trigger a notification when the device appears to enter or leave an area. It relies on location updates, so the alert can be delayed and the boundary is not a physical barrier.
By the editorial team · English edition: 14 October 2026 · Source article updated: 16 July 2026
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What to check
Open the supported zone feature in the app, choose a sensible area around the location and enable the relevant notifications. Avoid setting the boundary so tightly that ordinary positioning variation creates frequent alerts. Exact controls and available zone sizes depend on the provider.
Before you rely on it
Test the zone on a familiar route and check that your phone actually receives the notification. Review app permissions, battery settings and the device’s update mode if alerts fail. For pets, children or vehicles, agree a response plan instead of treating the geofence as a guarantee of containment or safety.