The Long COVID-19 Wearable Device Study

Inclusion Criteria: * Is at least 18 years old. * Has a self/and or physician diagnosis of: * Long COVID (based on the WHO working definition), * ME/CFS (myalgic encephalomyelitis / chronic fatigue syndrome, self-diagnosis based on IOM criteria), and/or * POTS (Postural Orthostatic Tachycardia Syndrome). * Is interested in tools to manage ME/CFS, POTS, and/or Long COVID symptoms. * Owns a wearable device they are willing to use for this study or does not own a device and agrees to utilize a study-provided one. * Agrees to wear the device throughout the study period, share the data with the study, and sync data at least weekly. * Has access to a smartphone or tablet to enable syncing wearable data and viewing device feedback. * Agrees to disclose involvement in other ME/CFS, POTS, and/or Long COVID interventions such as medical treatment, self-management, and other interventional studies. * Agrees to complete at least 75% of the study surveys. Exclusion Criteria: * As long as they meet inclusion there is no exclusion