The presented work describes an interactive environment that allows geriatricians and caregivers to access, analyze and understand a variety of heterogeneous data obtained from smart city ICT infrastructure. The objective is to identify and characterize relevant behaviour changes using the newly developed multifunctional dashboard interfaces. The overall goal is to detect as early as possible negative behaviour changes in the ageing population, likely to lead to insurgence of MCI/frailty situations. The environment is being developed and deployed in the context of City4Age, a project partially funded by the EU, within the Horizon 2020 programme.