First of all, you're going to need an internet connection for this app to work. But if you have one, this is a great app. This app allows users to enter multiple clinical symptoms into a problem list that is then cross referenced with a disease-symptom database. This is through our own database of over 900 diseases and 7000 data points which cross references your symptom list with ours. Each disease can be further drilled into with a tap, allowing the user to see the pertinent positive symptoms and the negative symptoms which were not entered. Every disease or symptom term in this app is a SNOMED-CT which is an international consensus for the best way to represent these concepts in words. We are carefully mapping SNOMED-CT symptoms to diseases, and our mapping is rapidly expanding and being updated regularly. This app does require internet access.