Affectech is an innovative training network funded by the European Commission under the Horizon 2020 Marie Sklodowska-Curie Innovative Training Networks. It will capitalise on European expertise in personal health systems, electrical engineering research in wireless devices, and human-computer interaction research. It will provide a tailored research training to 15 PhD students consisting of bespoke events, conferences and secondments to the network?s partner institutions. The project aims at advancing the state-of-the art of the technologies designed to promote mental health and well being. The project develops around three main topics: a) capturing emotions, by setting up wearable sensors and devices able to detect psychophysiological changes related to emotions; b) understanding emotions, by implementing apps and devices able to support better recall, exploration and sense making of the captured emotions; c) training emotions, by developing innovative technology-based interventions for training three of the most impactful adaptive, regulation strategies, which are cognitive reappraisal, mindfulness and biofeedback.