Overview
Ada is a digital health service with a symptom assessment app, web assessment experiences, and a medical information library. Users answer questions about symptoms, demographics, risk factors, and health history, then receive a report describing possible causes and suggested next steps. Ada explains that its assessment uses probabilistic reasoning developed with medical experts and a curated knowledge base; its U.S. terms also describe supporting large language model components. The company states that the service is informational and does not replace a medical consultation or provide a definitive diagnosis. Ada is a closed commercial health product available through its website, app, and partner experiences.