DeYa determines the type of the child's current activity (without movement, walking, running, in the car) and, when the type of activity changes, fixes the current location and transfers it to the parent account. Location data is transmitted in a non-personalized form.

The application has a convenient user interface for initial setup in the form of a widget.
The DeMoi app (https://play.google.com/store/apps/details?id=online.cloudgps.demoi) must be installed to view directions.