Get the PRO version – Complex RPN Calculator Review

Coddington has a PRO version of his RPN calculator app that works fine on iOS 9. It does not show both of the functions at the same time for keys that do double duty like the regular version did (for example X squared and square root of X), but at least it doesn't crash and doesn't have the annoying upside down "feature". For the second function keys, just type the 2nd key in the bottom left corner, and the entire keyboard now shows them. Hope the developer updates the app to adjust the PRO version to look more like the regular version keyboard, as the Pro keyboard has an odd look to it.
Review by ReallyDeepYogurt on Complex RPN Calculator.