StateCalc v3.0 is finally approved and already available on iTunes store (https://itunes.apple.com/us/app/statecalc/id891848148?ls=1&mt=8). This version uses the latest CoolProp engine instead of REFPROP, and so far supports 10 fluids. New versions and updates will come out very soon, and new materials will be added as bundles. I will also add binary mixture and moist air support as soon as I find some free time.
I just wanted to thank you guys for this great piece of code and your support. And also see if its possible to add StateCalc somewhere in coolprop.org, maybe under supporters or projects that use CoolProp.

Cheers,