Unobtrusive, convenient and innovative approaches for long term monitoring after disease are needed to detect functional decline. Modern digital behavior, as reflected in smart phone use, can be applied to monitor health in different groups of users with and without health issues. Since smart phones are ubiquitous, they are a natural means of collecting and analyzing data. Data recorded on phones have already been used to analyze sleep patterns, physical activity, epilepsy, mental health and sensorimotor processing. Intriguing associations between digital behavior and different aspects of human behavior and well-being have been found. In this study, we want to continuously record the interaction of 50 stroke survivors with their smartphones during the first 3 months after discharge. The linkage of smart phone use to function and quality of life will be assessed with standardized outcome measures at defined time points.