6 January 2013
This app does not follow the same RPN rules that my old HP 48G does. In fact, I can't figure out what, exactly it /does/ do. Basically only the first item in the stack is used, and it never gets "consumed" and removed from the stack--if you keep pressing + it will continue to add the first number in the stack to the result--this is not how RPN is supposed to behave.