(ProQuest: ... denotes formulae omitted.)IntroductionAs it represents a key-element of development, social sustainability includes concepts such as livability, health and community development, in this context the research about the healthy ageing phenomena and the friendliness of communities becomes an imperative. This research brings into play the development of mobile geographic information systems - GIS applications in the evolution of social requirements regarding the increase in the quality of life and autonomy of certain communities.The paper tries to offer a reliable answer to the questions whether the exploitation of mobile applications is beneficial for the senior citizens and if so what are the ways in which these applications should be developed so as to assure the best user experience. The concepts of citizen oriented applications [12] and usability are to be defined and described in a particular manner, in order to correspond to the social sustainability requests of specific communities.Another essential side of this research is to conclude if the process of software reengineering is appropriate for the radical transformation of legacy desktop software to mobile applications and how to add the mapping and GIS features, which are necessary for the fulfilment of novel social and economic objectives.The fact that the target group is the citizens of advanced age involves drawing some special requirements regarding the structure of user interfaces, user session duration and number of steps needed to meet immediate objectives. Making custom recommendations [9] and establish daily dosages to optimize of drug treatments, as well as notifying users about activities at certain times represent just a few of the functionalities these types of applications needed to increase the independence of the seniors.Some of the best-known aspects of sustainability achievement concerning the modern society are represented by age friendly communities and by the easiness of access to the resources by the senior citizens. In papers such as [1] the age friendliness of cities is analyzed, especially by taking into account the allocation of health resources. The knowledge-based society has as a main objective to offer the people in need the appropriate health resources and services in a suitable time, furthermore to support the autonomy and possibility of elderly to live in a secure, healthy and friendly environment, which presumes that they should be able to work with the new information and communication technologies so as to provide valuable information to the medical staff and to their families.In [1] the friendliness of city is analyzed by means of two main areas, such as the needs of the elderly and the capacity of the community to cover those needs. In order to create a clear view of the population lifestyle and health, indicators have been defined which measured the diets, movement and habits. In our case, specific indicators should be determined as well by means of mobile GIS applications specially build for this category of citizens. The use of mobile applications should be available for the grand majority of seniors in certain geographic areas. In some cases, either because of the lack of resources or because of the lack of digital education problems may appear. Consequently, some percentage of the senior citizens will not be included in the statistics. The exposure of the seniors to natural and anthropic risks may affect also their life quality and autonomy.In order to accomplish the social goals of healthy aging and to increase the life expectancy, it is very important that the data which result from the interaction of the senior citizens with the technological devices to be subjected to analytical procedures as well as the extraction of the most significant information, by the specialists, though data modelling and estimation procedures.Such procedures are identified in [2], in which exposure to environmental risk factors is assessed. …