Stroke is the second leading cause of death worldwide and causes significant morbidity, especially if the source is a cardiogenic embolism [1,2]. Atrial fibrillation (AF) substantially increases an individual patient's risk for stroke while oftentimes remaining asymptomatic [3]. A diagnosis of AF can be reached using an ECG recording as short as 30 s and can reduce the burden of stroke by establishing oral anticoagulation. With the emergence of smartphones and smart watches being increasingly used worldwide, technicians and policy makers alike see the opportunity to increase the likelihood of early AF diagnosis and by this to reduce its sequelae [4–6].
