Excellent scientific calculator with symbolic algebra, graphing, equations, integrals and derivatives. The calculator has globally more than 35 million downloads and 200 000 five-star ratings. You can write expressions in a natural way and watch your calculations. The result is displayed as a number, simplified expression etc. The calculator has several layouts suitable for various screen sizes: - "pocket" for small devices - "compact" for smartphones (in portrait and landscape orientation) - "expanded" for tablets A multiline display can be turned on in tablets to show the complete history of calculations and to provide access the previous results. Users can choose from several high-quality themes. The calculator has many functions, such as: - up to 100 digits of significand and 9 digits of exponent - basic arithmetic operations including percentage, modulo and negation; - fractions and mixed numbers; - periodic numbers and their conversion to fractions; - unlimited number of braces; - operator priority; - repeated operations; - equations (with one or more variables, systems of equations) - variables and symbolic computation; - derivatives and integrals; - graphs of functions, equations, integral area and limits; 3D graphs; - calculation details - extended information about a calculation like all complex roots, unit circle etc.; - matrices and vectors - statistics - complex numbers - conversion between rectangular and polar coordinates - sums and products of series - limits - advanced number operations such as random numbers, combinations, permutations, common greatest divisor, etc.; - trigonometric and hyperbolic functions; - powers, roots, logarithms, etc.; - degrees, minutes and seconds conversion; - fixed point, scientific and engineering display format; - display exponent as SI units prefix; - memory operations with 10 extended memories; - clipboard operations with various clipboard formats; - result history; - binary, octal and hexadecimal numeral systems; - logical operations; - bitwise shifts and rotations; - haptic feedback; - more than 90 physical constants; - conversion among 250 units; - Reverse Polish notation. The calculator has many settings to manage the full screen mode, decimal and thousand separators, etc. All features are described with a built-in help.