Great app; even better support

If you grew up using HP RPN calculators, this is the calculator for you. Its exactly what youd expect. And more. But even more important. I ran into a snag, emailed the developer, and had a response *in minutes*!! Was up and running minutes after that. For a $6 product, thats amazing. Im such a fan, its hard to put into words.

john dunham about allRPNCalc Calculator