$4.99 from Armin Heinrich
This is the pro version of the calculator.
Check and edit your data during and after the calculation.
CalcPro offers all basic and a lot of scientific and financial functions.
Take advantage of user variables and more.
Fast data entry (integrated keypad) and full edit features for your calculation.
+, -, *, /, sin, cos, tan, asin, acos, atan, sinh, cosh, tanh, pow, log, ln, sqrt, fabs, fac, madd, msub, mar, %, &, @, (, ), pi, e
Future updates will include even more features – and will be free for all existing users.