Expression Calculator 1.0

the author of this app says:

This is a great calculator. The program has the ability to deal with a wide variety of calculations, and has a scientific and basic mode to fit your needs at any given moment.

The calculator can support algebraic, transcendental, trigonometric and hyperbolic functions. It has a list of common constants in the chemistry, math or macros fields, or you can enter your own constants list. The best part is that you can save your work and come back to it later!

All in all, this is a great program for the student or the professional.