RPN Stack Calculator

Simple, Clean and Easy RPN Calculator for iOS. + Reverse Polish Notation. + 12 visible stack rows. + 100 stacks in memory. + Interactive stack. + Easy access to scientific operations. + Optional comma-separated numbers. + Undo/Redo functions. + Useful shortcuts. + Custom settings. Interactive Stack: - Drag numbers up and down the stack to relocate them. - Tap on stack to Copy / Paste / Delete rows. - Swap button. - Rotate buttons. Shortcuts: - Hold the ZERO button to input a triple-zero. - Hold the BACKSPACE button to clear the input box. - Hold the BACKSPACE button to clear the whole stack. Arithmetic - Trigonometry - Logarithms - Etc