NumWiz (Full)

In addition to a well designed scientific calculator, NumWiz provides a wide range of functionality to simplify everyday calculations. It gives the ability to carry out calculations in the following areas: composite numbers, factors, fractions, hcf (highest common factor), lcm (lowest common multiple), mean, median, mode, multiples, number bases, percentage, prime factorization, prime numbers, roman numerals, set notation, area, chi-square distribution, correlation coefficient, density, force, molar mass (molecular weight), perimeter, power, pythagoras' theorem, quadratic equation, standard deviation, standard error, variance, velocity, volume and z-score probability.

It also includes a stopwatch, a timer with optional alarm settings, a password generator, and a GMT display.

The conversion section of the app allows you to convert angle, area, currency, energy, length, power, pressure, speed, temperature, time, volume and weight.

In addition, the app has awesome features, such as the ability to read answers aloud. Many other features are to be discovered in this fully integrated, seamless application.