Great RPN Calculator

For those looking for a Reverse Polish Notation (RPN) calculator emulating HP RPN calculators with a viewable stack, this is the app.

For those uninformed, RPN calculators do not use an equal sign as the operator follows the operand. Please do not downgrade this app if you are only familiar with more common calculators that use an equal sign (=) and parentheses (( )).

Espirito gs about ND0 RPN Graphing Calculator