This invention provides a mechanism for invocation of wireless mobile terminal (Smartphone) apps according to spatial events. The spatial events relate to either entering or being within or exiting or being outside of a physical space. For planes, the spatial boundary may be a circle or the perimeter of an arbitrary polygon. For a three dimensional space, the spatial boundary may be a spherical surface or the surface of an arbitrary polyhedron. Spatial parameters, that identify a boundary, are provided by a Smartphone app builder to an interactive compiler for defining a spatial region. The algorithms for doing so are provided herein. The name of the spatial configuration is afterwards inserted within an Invoke facility service's Boolean expression by the builder of an Invoke facility service. The builder defines which manner of spatial event activity is to be utilized within the Boolean expression.