Ada Health

Ada Health is a free AI symptom checker that helps you understand what might be wrong when you're not feeling well. You start by telling Ada your symptoms, and it asks tailored questions to narrow down possible conditions. It draws on a medical library of doctor-created articles, so you get evidence-based information without a clinic visit. The 2026 update brings refreshed clinical knowledge and a redesigned assessment report, making results easier to understand and share with a clinician. Ada works as a mobile app for iOS and Android, and supports multiple languages including English, Spanish, German, Portuguese, Romanian, and Swahili. Romanian and Swahili were recently reintroduced, which makes the app more useful for travelers and non-English speakers. You can track symptoms over time, export your assessment report, and browse the medical library for tips on staying well and managing conditions—like staying cool in extreme heat or avoiding Lyme disease. For health systems, payers, and pharma companies, Ada offers enterprise white-label solutions and APIs. The goal is to intercept people at their first symptom—before they default to the emergency department—and route them to the most appropriate care. This can reduce unnecessary ED visits and help pharma find patient populations that other data tools can't reach. Published research, including a 2026 NEJM AI study, shows that after a single Ada assessment, 38.5% of patients who planned an ED visit chose lower-acuity care instead. Compared to paid chatbots like K Health or Buoy, Ada stays free for individuals. It's a solid first step for everyday health questions, but it's not a replacement for a doctor, emergency services, or telemedicine. If you need quick, reliable triage for low-acuity concerns, Ada is worth a download—just know that it won't manage chronic conditions or connect you directly to a clinician.