Remote Assessment of Disease and Relapse – Central Nervous System (RADAR-CNS) is an international research programme exploring the potential of wearable devices to help prevent and treat depression, multiple sclerosis and epilepsy. This project has received funding from the Innovative Medicines Initiative 2 Joint Undertaking under grant agreement No 115902. This Joint Undertaking receives support from the European Union's Horizon 2020 research and innovation programme and EFPIA. See www.imi.europa.eu for more details.