The ultimate calculator: rotate your phone between a basic and a very capable scientific one (but you can lock it down to one, if you prefer): In portrait mode, you have a basic calculator with: - basic mathematical operations - 00 and double-sized plus buttons - normal and financial (two decimal digits) display - percent, reciprocal, square and square root - memory add, subtract, read, write, clear - value added tax calculation - currency conversion - paper-like, scrollable multi-line display.