City4Age Athens (Elderly-friendly city services for active and healthy ageing) is an innovative application funded by the European Commission under the Horizon 2020 Programme. Users can track their routes and keep statistics about their position, speed and moving time. This information will be anonymously collected in order to help the early detection of risk related to frailty. Moreover, collected activities can help City4Age provide personalised intervention that can help the elderly population to improve their daily life.