Smartwatches can contribute to increased physical activity and weight loss in chronic patient groups, especially when included as a subcomponent in a bigger lifestyle intervention. ECGs from smartwatches can most likely be used to screen for atrial fibrillation in general practice. However, there is yet no definitive clinical validation and systematic studies on the possible consequences of using smartwatches. Access to more reliable health data in the patient's home may be the key to better health for chronic patients. Digital monitoring could become an important aspect of future health care, as argued in this review.