The design of a mobile application is a tedious task owing to its intrinsic variability. Software designers must take into account in their development process the versatility of available platforms (eg Android, iPhone, tablets). The variety of existing devices and their divergences (eg frontal camera, GPS) introduce a further layer of complexity to the development process. In addition, at runtime, many potential situations have to be considered (eg limited connectivity, hardware heterogeneity, changes of user preference, etc.). Such software systems are seen increasingly as evolutive systems.