yExpression app for iPhone and iPad

The most important advantage of this calculator is: it is an expression based calculator. Compared with normal calculators this expression based calculator shows you always which numbers and operators you have entered. You know at every time what you calculate.

An expression is calculated according to the following priorities defined in Mathematics:

- the 1st priority: functions like sin, cos, tan, arcsin, arccos, arctan, log and ln;

- the 2nd priority: power (^);

- the 3rd priority: multiplication (x) and division (/);

- the 4th priority: addition (+) and suntraction (-)

E.g., logπ^3.4 = (logπ)^3.4; sin36 x 2.6 = (sin36) x 2.6.

For convenience the unit of the input decimal number for sin, cos and tan is degree.

This app makes you much easier and more convenient by calculating of a lot of numbers in a complicated structure in one step. E.g.,

45.98 - 89 x 3.12 / 100 + 1.1 x 1.2 x sin89 x (8 + cos34 x (3.9 / tan45 - 7.9 x (arcsin0.9 - arccos0.4 - arctan38) + logπ^3.4 + lnπ^e)) = 73.4023584178

Please enjoy yExpression!