DozenCalc

A dozenal (duodecimal, or base-twelve) calculator with both

simple and scientific modes. Simple mode (automatically

chosen when in portrait orientation) contains the four

functions, square roots, exponents, and parentheses for

grouping, and operates to four digits of fractional

accuracy. Scientific mode (automatically chosen when in

landscape orientation) has all of the same features, plus

trigonometric functions and their inverses, logarithms,

reciprocals, buttons for pi and the base of the natural

logarithm, and variable precision allowing the user to

select the number of fractional digits desired.