nH2O

nH2O is a Mac program that helps you calculate thermodynamic properties of water and steam directly from your computer.

This application is meant for engineers who require assistance in dynamic thermodynamic simulation and wish to easily determine pressure, temperature, density, and other properties for given water and steam values.

The utility provides you with various selections for your computations. For instance, you can choose the preferred unit type (SI or US) and values for temperature, pressure, and enthalpy. Not sure why the application gives you access to a Calculate button, since it automatically determines and displays the results.

A good aspect is the fact that you can copy the calculation results to your clipboard and paste them in any other third-party Mac programs.

Other than that, not much more can be said about nH2O as it does exactly what's being stated on its Mac App Store page.

In conclusion, if you're an engineer that requires accurate steam and water properties calculations, you should definitely give nH2O a try. What's more, it's free of charge.