AI clinical simulator

What if you could practise on a patient right now?

Take a history from a patient who answers back, order the tests, and commit to a diagnosis. Practise any time, even at 2 a.m., with no partner to find. A full case takes around 15 to 20 minutes.

No signup
Real AI patient
Talk or type
About 3 minutes
Download on the App StoreGet it on Google Play
Taking a history from the AI patient, with vitals and the case summary alongside

How it works

One case, start to scorecard.

Take the history, order the tests, commit to a diagnosis, get marked. Four steps, the same shape as a real encounter.

01Talk to the patient

Take the history, in your own words.

A real-feeling patient sits in a video tile. You ask, they answer, pause, get distracted, sometimes go quiet. Vitals and history live in the side panel; your scratch notes stay in front of you. No rubric ticks during the case, so you can stay in the conversation.

The encounter screen: the patient on video, vitals and presenting complaint on the right, your scratch notes below.
02Examine & investigate

Order the tests. Read what comes back.

Search the full catalogue and order what you need — no menu narrows it down for you. Labs and imaging come back the way they would on the ward, flagged relevant or not, for you to interpret.

The investigate screen: an ordered 12-lead ECG showing ST elevation, and a rising troponin, both marked abnormal.
Blood tests
Imaging & bedside
03Diagnose & prescribe

Commit to a diagnosis and a plan.

Put your working diagnosis, your differentials, and a management plan on the line before anyone tells you the answer. Committing is the point: it is the difference between watching a case and running one.

The diagnose screen: a chosen main diagnosis, differentials, and a searchable management plan.
Main diagnosis
Differentials
Management plan
04Get marked

When you wrap up, the rubric shows you what you missed.

A score out of 100, with each competency graded and a one-line note on what you missed. The full transcript with the slips marked, and cases to try if you want to drill the same thing.

The scorecard screen: an overall score with a Strong band, and per-competency bars for communication and clinical thinking.
andSee who else is working

Ranked alongside everyone at your stage of training, anywhere in the world. Overall, and broken out by specialty.

LEADERBOARD · THIS WEEK

Who’s putting in the reps.

Overall

1,712 trainees this week

#

Trainee

Avg

Cases

#1

🇬🇧

Dr Hannah

UK · IM

9.4

11

#2

🇮🇳

Dr Praveen

IN · IM

9.2

14

#3

🇺🇸

Dr Sara

US · GP

9.1

8

#4

🇧🇷

Dr Felipe

BR · IM

9.0

10

#5

🇬🇷

Dr Eleni

GR · Surgery

9.0

9

#6

🇯🇵

Dr Akari

JP · Peds

8.9

12

#7

🇬🇭

Dr Kofi

GH · EM

8.8

11

#243

🇬🇧

Dr Aisha

You

UK · IM

6.8

9

By specialty

#1

🇬🇧

Dr Hannah

UK · IM

9.4

11

#2

🇮🇳

Dr Praveen

IN · IM

9.2

14

#3

🇧🇷

Dr Felipe

BR · IM

9.0

10

#4

🇩🇪

Dr Wilhelmina

DE · IM

8.7

13

#5

🇨🇿

Dr Tomas

CZ · IM

8.6

12

#14

🇬🇧

Dr Aisha

You

UK · IM

6.8

9

96 trainees in Internal Medicine this week.

The four screens above are real captures from the app. The leaderboard is illustrative. The demo at the top of this page is the real thing.

Watch a full case

The whole thing, start to scorecard.

Ninety seconds through one real case, so you can see exactly how it plays before you start your own.

Diagnosica walkthrough: one full case from history to scorecard

Who trains here

Same patients, different stages of training.

Medical student

UK clinical years · US M3-M4 · IMG

You have read the conditions. You have barely said them out loud to a patient. Take a couple of full histories a week, in the gaps between lectures, until the words come without thinking.

"I've been in lectures for two years. I need to start talking to patients."

Start a case free

Foundation · Intern · House Officer · JMO

First year out, anywhere in the world

One case before the shift, one after. The same conversations you will have for real next week, run enough times that the real one is just another rep.

"First on-call is in three weeks. I want to have these conversations a hundred times before the real one."

Start a case free

Resident · Specialty Trainee · Registrar

Years 3+ of postgrad training

Sharpen the presentations you rarely see before they turn up on the ward. Quick, targeted reps across specialties, whenever you have twenty minutes.

"Boards in eight weeks. And I want to stay sharp on the consults I don't see often."

Start a case free

What’s behind the cases

Real cases. Honest feedback.

No invented experts and no fake reviews. Just real clinical cases, and a scorecard that is honest about being AI while we validate it with clinicians.

57

Real clinical cases

Every case is built from a real presentation and current clinical guidelines, across specialties and difficulty.

Scoring you can learn from

Your scorecard is AI feedback, marked while we validate the scoring with clinicians. It shows you the gaps, it does not certify you.

Kept current

Each case is versioned. When guidance moves or a reviewer spots something, the case is corrected, not left to drift.

Every case is marked against the core clinical competencies you are assessed on.

More on the way.

  • History taking

  • Investigations

  • Diagnosis

  • Management

The alternatives

You’ve had three ways to practise.
Now there’s a fourth.

The question bank

Reading another vignette is not the same as saying it out loud. You know the theory. The words still come out wrong the first ten times.

Reading, not talking

Role-play with a friend

Needs a willing friend, a free evening, and someone who can actually mark you. Most weeks you get none of the three.

Scheduling, no scoring

Wait for the wards

Real patients are the best teachers and the scarcest. The registrar takes over, the shift ends, and the reps go to someone more senior.

Slow, high stakes

Your AI patient

A patient who answers back, any hour, marked against the rubric when you wrap up. Get it wrong safely, then try again.

Live now · free tier

Try the live demo

The detail, feature by feature.

The shape of the problem is, “I need to say it out loud and have someone respond.” The shape of most existing products is, “read another vignette.”

CAPABILITY

Diagnosica

Pastest

Geeky Medics

AMBOSS LiSA

Voice-first practice (you speak, the patient answers)

Video patient avatar

Rubric scoring after every case

Available at any hour without booking

International postgrad exam coverage

Specialty + body-system + difficulty browse

Leaderboards across specialty and country

Transcript export for review

Physical examination practice

Out of scope for any voice product. Stay with real patients and tutors.

Comparison reflects publicly visible product capabilities as of May 2026. Pastest, Geeky Medics, and AMBOSS are independent companies; this is not a competitive endorsement of Diagnosica by any of them.

A new case to crack, most days.

Short clinical cases and reasoning breakdowns, posted where you already scroll.

Pricing

Two tiers. Simple pricing while we’re early.

Start on Free without a card. Upgrade when three cases a week stop being enough.

Free

$0

forever

  • 5 cases your first week, then 3 a week

  • Unlimited 2-minute quick cases

  • Full scorecard after each case

  • Public leaderboards

  • No card required

Start free
Most popular

Standard

$14.99

per month

  • 50 full cases a month

  • Full scoring after every case

  • All specialties and body systems

  • Transcript export

  • Or $119.99/year

Get Standard

Pricing shown in USD; you’re billed in your local currency at checkout, with tax added where it applies. UK cards pay £15 a month or £129 a year. Cancel any time from your profile. Quick cases are unlimited on every plan.

FAQ

Questions we get a lot.

Four steps, in the order a real encounter runs. You take a history from a patient who answers in their own words and does not volunteer the thing you forgot to ask. You order the labs and imaging you want, from the full catalogue, and read what comes back. You commit to a main diagnosis, your differentials and a management plan. Then you get marked. Around 15 to 20 minutes end to end.

Across four areas worth 25 points each: history taking, investigations, diagnosis and management. You get a score out of 100, a breakdown by area, and a line on the single thing that would have moved your score most. It is labelled formative for a reason: the scoring is AI feedback while we validate it with clinicians, so treat it as a training signal, not a result.

It helps with the part of an exam that is a conversation with a patient and a decision you have to defend, which is the part most people get least practice at. It is not an exam simulator, it does not predict a mark, and it is not affiliated with any exam board. If you want question banks and mark schemes, keep using those; this is the reps you cannot get from reading.

Yes, and without a card. Free gives you 5 full cases in your first week, then 3 a week, each with a full scorecard, plus as many two-minute quick cases as you like. Standard is $14.99 a month or $119.99 a year for 50 full cases a month and transcript export; UK cards pay £15 a month or £129 a year. Cancel any time from your profile.

Because we would have to fake them. A simulator cannot fairly reproduce a heart murmur, a tender abdomen or a subtle neurological sign, and pretending otherwise would teach you to trust a signal that is not there. Examination stays with real patients and real tutors. We would rather be short a feature than wrong about one.

They are yours. We never accept real-patient identifiers, and the cases are written, not drawn from anyone’s records. UK GDPR and the equivalent regional rules apply. You can delete a transcript at any time, without being asked why.

Yes. Diagnosica runs in any browser and there are native apps on iPhone and Android. Your cases, streak and progress are the same account on all of them, so a case you start on a laptop is waiting on your phone.

Get started

It’s live. Run your first case tonight.

No demo call, and no card to start. Sign up, pick a case, and you are talking to a patient within a couple of minutes.

Or take it with you. Diagnosica runs on iPhone and Android.

Download on the App StoreGet it on Google Play