Helping healthcare professionals diagnose better, faster

Dem Dx works in over 160 countries to help healthcare staff and students to improve their clinical diagnostic-reasoning skills.

A Better Way to Support
Medical Diagnosis

Dem Dx guides users as they diagnose patients, moving from presenting complaint, through associated symptoms and signs to final diagnosis. At each stage, Dem Dx suggests the most relevant question to ask or sign to elicit.

10,000+ Clinical Presentations

1,300+ Clinical Conditions

14 Specialties

500+ Media files


Dem Dx has been developed with the support of our global community of medical specialists. All our content is updated on a regular basis to ensure access to the latest in medical thinking.




“Dem Dx has won me over as a fantastic teaching resource for case based teaching with undergraduate medical students.”

Consultant in Children’s Emergency Medicine
Evelina London Children’s Hospital, London

“Dem Dx is an essential pocket tool for every junior serves as a quick reference guide to enhance confidence in clinical decision making and diagnosis.”

Academic Clinical Fellow in General Practice
Guys and St Thomas' NHS Foundation Trust, London

“Dem Dx is a unique app that effectively aids my clinical learning by giving me logical pathways to help efficiently narrow down diagnoses.”

5th Year Medical Student
Imperial College Medical School, London

“Dem Dx is fantastic, allowing me to put together differential diagnoses from the reach of my pocket. Great for ward rounds, clinic settings and independent study too!”

5th Year Medical Student
Imperial College Medical School, London

“Dem Dx has helped me confirm my hypotheses and made me think about differentials. I definitely recommend Dem Dx for medical students and young doctors to build confidence on their clinical reasoning.”

Medical intern
Belo Horizonte, Brazil

Access Dem Dx Today

Sign up to Dem Dx today to receive a 1 week free trial, with full access across mobile, tablet and desktop