It's already published on the Android Market the last version of Rash Diagnosis (v 1.2).
This version includes a new question in a new step to help you differentiate between the common rashes. It also includes a new failsafe answer in each of the diagnosis steps. The test result now displays the probability given to the result calculated based on your answers.
Give it a try!
Remember it at http://www.sapphirebits.com/home/rashdiagnosis.