"SimMon is a medical simulator app that takes the form of a simple patient monitor. There are a number of physiological parameters that can be measured including ECG, arterial waveform, oxygen saturation, BP and more. One of the strengths of this app is that it can be remotely controlled by another iPhone or iPad."
Get a list of possible diagnoses in seconds covering over 15,000 disease manifestations such as symptoms, labs, ECG, X-ray, CT-scan, MRI, ultrasound...