Can I just use ChatGPT to practise history taking?
Updated 19 October 2026
You can, and it is a fair free start: ask ChatGPT to play a patient and it will. What a general chatbot does not give you on its own is a patient who holds back what you have not asked, real results and imaging to interpret, and marking against the same competencies every time.
That is the gap a dedicated simulator like Diagnosica fills.
Diagnosica is an AI clinical simulator for medical students and junior doctors. You take a history from an AI patient on video, by voice or text, order labs and real imaging, commit to a diagnosis and management plan, and get a competency scorecard.
Side by side
| A general chatbot | Diagnosica | |
|---|---|---|
| The case | You write it, or it invents one | Ready-written cases across specialties, clinically reviewed |
| The patient | Behaves as well as your prompt; can hand over the answer if you lead it | On video, by voice or text, and only tells you what you ask |
| Investigations | Results made up on request | Labs plus real radiology images |
| Marking | Whatever you ask for, different each time | Score out of 100 across eight fixed competencies |
| Progress | None kept | History, streaks, weekly leagues |
| Cost | Free tier available | Free tier available; Standard $14.99 a month or $119.99 a year (UK: £15 a month or £129 a year) |
If you do use a chatbot, three things help
- Write the case yourself first (diagnosis, history, results) and paste it in, so the patient is consistent.
- Tell it to answer only the question asked and never name the diagnosis.
- Ask for the marking scheme before you start, not after, so it cannot grade to fit.
Diagnosica does those three things for you, on your phone, in about 10 minutes a case.
Common questions
Can I use ChatGPT to practise history taking?
Yes, as a free start. Write the case yourself first, tell the chatbot to answer only the question you ask and never to name the diagnosis, and set the marking scheme before you begin, so it cannot grade to fit whatever you did.
What does a dedicated simulator add over ChatGPT?
A patient who only answers what you ask, lab results and real radiology images to interpret, and marking against the same eight competencies every time, so scores are comparable from one week to the next. Diagnosica does this on the web, iPhone and Android in about 10 minutes a case.
How much does Diagnosica cost?
Diagnosica is free to start, with no card. A free account gets 5 cases in your first week, then 3 cases a week, plus unlimited 2-minute quick cases, with every case in the library open. Standard is $14.99 a month or $119.99 a year (UK: £15 a month or £129 a year) and allows 50 cases a month. Prices as of 19 October 2026.
Does Diagnosica work on Android and iPhone?
Yes. Diagnosica has native apps on Google Play and the App Store, and runs in any browser at app.diagnosica.com. It is one account across all three, so your cases, streak and league position follow you from a laptop to your phone and back.
Is Diagnosica legit, and who makes it?
Diagnosica is a small, independent company operated by CC Global Group LLC, live on the web, the App Store and Google Play. Cases are written for teaching and clinically reviewed before they go live. It is a learning tool, not a medical device, and it is not affiliated with any exam board.