Ada
FreeDifficulty: Easy
Last checked: 16 October 2026
What Is It, In Plain Words?
Ada is a free symptom checker app. You tell it what's wrong, it asks you questions like a doctor might, and then it suggests possible causes and what to do next, such as rest at home, see a GP or get urgent help.
It is not a diagnosis, and it can't examine you. Use it to understand your symptoms before speaking to a doctor or pharmacist.
What You Can Use It For
- Before a GP appointment. Work through your symptoms so you know what to mention.
- Deciding where to go. It suggests whether to see a pharmacist, book a GP or get urgent care.
- Checking on someone else. You can do an assessment for a family member.
Getting Started Step By Step
On A Phone Or Tablet
- Open the App Store (iPhone and iPad) or Google Play (Android).
- Search for Ada and check it's made by Ada Health. Copycat apps exist.
- Tap Get or Install, then open it.
Your First Check
- Open the app and create an account with your email.
- Tap Start symptom assessment.
- Type your main symptom, such as "sore throat", and answer each question by tapping an answer.
- At the end, read the possible causes and the advice on what to do next.
Things To Try Typing
Examples of symptoms you might type to start an assessment.
- Headache behind my eyes for three days
- Swollen ankle after a fall
- Dizzy when I stand up
- Cough that won't go away
What It Costs
It's free. There's no paid version to buy.
If anyone asks you to pay to use it, or to "unlock" it, that's a scam.
Privacy And Safety
- What it keeps. Ada stores your health answers in your account. Read its privacy policy, and delete assessments you don't want kept.
- In an emergency, don't use an app. Call 999 (UK) or 911 (USA) for chest pain, stroke signs, severe bleeding or breathing problems.
- Never type passwords, PINs, bank or card numbers, your National Insurance number (UK) or Social Security number (USA).
- Check important answers about health, money or the law with your doctor, pharmacist, bank or a qualified adviser.
Good Points And Watch-Outs
Good Points
- Asks clear questions one at a time.
- Gives a sensible next step, not just a list of scary illnesses.
- Works with your phone's larger text settings.
Watch-Outs
- It is not a doctor and can be wrong.
- It only knows what you tell it.
- Results may worry you. Talk to a GP, pharmacist or NHS 111 (UK) if you're unsure.
Similar Tools
- Medisafe: pill reminders that can alert a family member.
- ChatGPT: the best-known chatbot, with a simple app and voice mode.
- Gemini: Google's assistant, handy if you use Gmail or an Android phone.
Common Questions
- Is Ada free?
- Yes, the symptom checker is free.
- Can Ada diagnose me?
- No. It suggests possible causes and what to do next. Only a doctor can diagnose you.
- What should I do in an emergency?
- Don't use an app. Call 999 in the UK or 911 in the USA.
Safety tip: never share passwords, bank details or ID numbers with any AI tool.
Website of Ada (opens in new tab)
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Updated 24 October 2026

