Abstract. This paper targets with applications running on mobile devices and using context informations. Following previous studies from other authors, we extend the notion of context area replacing distance function by cost function. Using this extension, we exhibit three different modes of selection and demonstrate their differences on a mobile applications: the museum visit. 1 Motivations With the expansion of mobile devices in our life (PDA, cellular phones, ...), we have observed for some years the development of applications taking context into account. For example, it is natural to take into account the localization of a user in an application which aims at giving a list of nearby restaurants. Moreover, the application should also consider the opening days and hours in order to select relevant items in this list using the current date and time. Context-aware applications are intended to simplify the interface between the user and the machine. The concept of context and its eva...