- Solves and plots explicit and implicit equations of the forms y=f(x) and y=f(x,y).
- Equations are entered and displayed in their natural form, as they would appear in a textbook.
- 59 categories of units in library, divided into english, metric, and SI systems.
- Equations, constants, and user-defined unit conversions can be saved into libraries.
- Well-organized Main, Trigonometric, English, and Greek keypads.
- Help screen overlay provides pop-up description of the function of key buttons.
- Tutorials provide demonstration of the calculator’s capabilities by programmatically stepping through graphing, equation creation and saving to the library, and unit conversion examples.

- Plots explicit and implicit equations of the forms y=f(x) and y=f(x,y).
- Up to 3 equations can be plotted simultaneously.
- Pinch and Pan capabilities.
- Linear, log, inverse, inverse for celsius, inverse for fahrenheit scales for both x and y axes.
- Cursor displays both the y-value and slope for each equation.
- Cursor can be controlled by a finger or by entering an exact x-value into a textfield.
- Area under the curve and line segment length can be displayed for a specified x-value range for one equation.
- For two equations, the area between the curves and the line segment length for both curves are displayed.

- Equations (of the forms y=f(x) and y=f(x,y)) are created and displayed in their natural form, as they would appear in a textbook.
- Number Mode allows equations based on y (dependent variable) and x (independent variable) to be quickly created, solved, plotted, and have unit conversions carried out on the dependent variable.
- Variable Mode allows equations with more complex variables to be created and saved to the equation library under user-defined categories.
- Unit conversions can be carried out on result.
- Up to 3 equations from the library can be plotted simultaneously.
- Super- and subscripting of variables.
- Functions include square root, squared, x to any power, log, ln, 10 to any power, e to any power, factorial, trigonometric (including inverse), hyperbolic (including inverse).
- Button selector allows the variable symbol or its value to be displayed in the equation.
- Previously used equations are maintained in memory and can be re-accessed by means of a drop-down selection window.

- Unit conversions are made simultaneously, and are displayed as a table of all units of the same category.
- New units can be created and saved to the library, using the base units (m, s, g, ft, lb, etc).
- New units are easily created using picker dials for the metric prefix (k, M, G, etc), base units, and power of 1, 2, 3, etc.

- Equation library with categories of Algebra, Geometry, Physical Properties (Vapor Pressure), Heat Transfer, Statistics, and Electricity.
- Physics constant library.
- New Equations and Constants can be saved to libraries under user-defined categories.
- Equation library has a summary page for each equation, which includes a display of the equation, its variables in table format, and a detailed description.

- E-mail contact is accessed through a button provided in the Help/Tutorial screens.
- Memory stack maintains values, variable symbols, and equation names of an unlimited number of previous calculations, which can be easily accessed for future calculations.
- Multiple answers for implicit equations are saved to the memory stack.
- Period or comma can be used as decimal separator.
- Degrees or radians for trigonometric functions.
- Decimal or Scientific Notation, and number of significant digits can be easily specified.
- Convergence criteria and maximum number of iterations can be specified for implicit equations.
- No advertisements

- Solves explicit equations, which are created and displayed in their natural form, as they would appear in a textbook.
- Variables, units, and constants can be created and used in the equations, with no limit on the number of each of these.
- 59 Categories of Units.
- Can be used as a stand-alone Unit Converter, or to convert the results from the Scientific Calculator.
- Units can also be converted for use as input to the Scientific Calculator.
- Units can be quickly retrieved, to convert directly (Unit Conversion Mode), or for insertion into the variable table, by use of picker dials to select categories (area, mass, volume), systems (english, metric, SI) and units (kg/s, °C, m/h).
- Unit conversions are made simultaneously, and are displayed as a table of all other units of the same category.
- Subscripting and superscripting for variable and constant symbols and units.
- Multiplication operator is optional in most cases.
- User-created equations, units, and constants can be saved to libraries under user-defined categories.
- Numbers use decimal number precision and can have a mantissa of up to 38 digits with a scientific notation range of 10^-128 to 10^127.
- Exponent, multiplication, division, addition, and subtraction operations maintain decimal number precision. All other operations and functions are executed with long double precision.
- Complete English and Greek keypads, both with small and large caps, for creating variable and constant symbols and units.
- Trigonometric keypad with inverse and hyperbolic functions.
- Keypads appear automatically, depending on current need.
- Decimal or scientific notation with 0 to 37 decimal places.
- Degrees or radians for trigonometric functions.
- Includes an extensive unit library and sample equation and constant libraries.
- Units can be quickly retrieved for insertion into the variable table by use of picker dials to select categories (area, mass, volume), systems (english, metric, SI) and units (ft, cm, m).
- Equation library has a summary page for each equation, which includes a display of the equation, its variables in table format, and a detailed description.
- Number Mode allows rapid entry of numbers, operators and functions to create an equation in textbook-display format.
- Variable Mode allows the creation of a variable table with symbols, descriptions, units, and values, which are then readily entered along with numbers, operators, and functions to create, save, and execute an equation in textbook-display format. Alternatively, equations can be retrieved from one of the categories in the equation library. The result of the calculation is automatically converted to all units in the same category and display in a table.
- Unit Conversion Mode allows unit conversions to be made directly simply by entering a number and its units. The result is displayed in a table as described for Variable Mode.
- Button selector allows variable symbols or their numeric values to be alternately displayed in equations.
- Memory stack maintains values, variable symbols, and equation names of several hundred previous calculations, which can be easily accessed for future calculations.
- Previously used equations are maintained in memory and can be re-accessed by means of a drop-down selection window.
- Help screen overlay provides pop-up description of the function of key buttons.
- Tutorials provide demonstration of the calculator’s capabilities by programmatically stepping through the creation, use, and saving of several different equations.
- E-mail contact is accessed through a button provided in the Help/Tutorial screens.
- Idle timer is disabled so that screen does not dim and calculator is available continuously until deselected by user.
- Works with iPhone 4s through iPhone 6s and 6s Plus, and iPad.
- No advertising.