A + Calc is a scientific calculator A+ Calc is a scientific calculator with an edit display that shows all calculations and allows editing and recalculating equations. A+ Calc includes; hexadecimal and statistics calculator tools, undo and redo buttons, 1024 character scrollable edit display. Trial use only applies to premium features, most features are available free of charge. View, edit and recalculate with new values and/or operators. Simple uncluttered user interface.