the author of this app says:
With 2xCalc, a currency calculator with standard and RPN modes, you can select two currencies from the pulldown menus, enter a calculation and watch the program quickly display the conversions. You also have undo and redo capabilities for the last calculation.
Sharing information with other applications is easy. 2xCalc uses the clipboard to copy and paste data.
A currency swap feature changes the active currency and allows you to compare prices rapidly.
You can select which currencies to display, along with their conversion factors.
This update includes added conversion types, more user forms and color support.
This program requires Palm OS® 2.0 or later.