Key Features:

• Supports a rich expression format, which is in most cases identical to what you would type in your programming language.
• Support for adding unlimited numbers of variables or variable expressions.
• Built-in debugger that lets you see the expression simplified step by step.
• Debugger Back-step lets you backup as many steps as you like so that you can replay critical operations.
• C/C++ operator precedence.
• Mouse optional, all calculator commands and functions can be done using the keyboard alone.
• Mini-Calc Mode lets your calculator take up very little screen real estate, and yet remain entirely usable.
• Running paper tape(s) (1 per calculator) for calculations, allows annotations, and is stored between runs.
• Built-in Ascii chart makes it easy to look up even invisible characters.
• View results in big endian (default) or little endian.
• Numerous built-in unit conversions (memory sizes, lengths, areas, volumes, temperatures etc.)
• Built-in great circle route and straight line distance calculator.
• Option to increase the size of the calculator for those who need it.

• Binary, Octal, Decimal, hexadecimal, hexFloat32 (out only), hexFloat64 (out only), HexColor24 (out only) Booleans, Characters, UTF-8 (out only), and UTF-16 (out only).
• Convert automatically between these types in your expression with the keyboard, a button, or a contextual menu.

• Standard: Addition, Subtraction, Multiplication, Division, Modulus, Power, Square Root.
• Grouping: Parenthesis.
• Variables: Previous Answer.
• Bitwise: complement, and, or, xor, shift left, shift right.
• Comparators: equals, less than, greater than, less than or equal, greater than or equal.
• Logical: and, or, and not.
• Trigonometric: Sine, Cosine, Tangent, Arc-Sine, Arc-Cosine, Arc-Tangent, Degrees To Radians, Radians to Degrees.
• Other: Min, Max, Round, Ceiling, Floor, Absolute Value, Sign.

• Pi

• Now computes negative binary and negative octal numbers.
• Now allows you to see the calculator interface at various scaling factors 1x, 1.2x, 1.5x, 1.8x, 2x, 2.5x and 3x. See iota-calc preferences to change the scaling factor.
• Adds a "Restore Factory Defaults" button which restores each preference to its default state.