The iPhone includes a built in calculator with is great for performing quick sums, but is found wanting should you need to perform for complicated calculations. TouchCalc is an advanced scientific calculator that offers various modes of operation.
In scientific mode, you have access to a wide range of functions including logarithm, roots, trigonometry and much more. The colour coded buttons make it easy to distinguish between different types of operator.
TouchCalc can also be used in bit/integer mode in which you have the option of displaying values as binary, octal, decimal or hexadecimal numbers. You can also perform calculations in 8-, 16-, 32- or 64-bits.
A statistics mode is also available for performing calculation with several values. This means that it is easy to quickly determine the mean, median, standard deviation and other quality of a range of numbers.