Inclusion Criteria:  Age ≥18 Diagnosed with MS according to the revised McDonald criteria 2017, all clinical forms inclusive (CIS, RRMS, SPMS, PPMS), for PwMS only In possession of a DreaMS App compatible smartphone (iOS/Android) Corrected close visual acuity of ≥0.5 Hand motor skills sufficient for using a smartphone Ability to follow the study procedures Informed Consent as documented by signature  Exclusion Criteria:  Being diagnosed with MS or other disease affecting neurological and cognitive functions, for HC only Other clinically significant concomitant disease states (e.g., renal failure, severe hepatic dysfunction, severe/unstable cardiovascular disease, progressive cancer, etc.) Known or suspected non-compliance, drug or alcohol abuse