This time we go the whole nine yards.
After testing and using the rpn-calculator on the iPod Touch, a member of my family (with tablet) asked if it was possible to do a non safari version. I made some changes and wrote a .webapp wrapper for prism, so that it can be used comfortably on prism (or firefox).
What's prism and what are .webapps? prism is basically a webbrowser without the browser UI. It loads .webapps (webpages) and runs them like a normal applications.
Here's the rpn-calculator.webapp.
If You have installed prism, this will load and install the calc.