Excellent emulation of a timeless calculator! Extends its capabilities in numerous (as it were) ways.
As far as I've been able to determine, the underlying engine is the same as the hp12c Platinum calculator from the same developer - so pick the finish you like the most, and you will get the same functionality.
WARNING: support appears to be non-existant. Pay-Pro licensing is prompt, but questions about previous licenses - or any other questions - appear to be directed to a dead email address.
Plus 5 for the emulation. Minus 5 for the support. Hmm, I can't give it a zero.
Well, considering it's still PPC, but such a beautiful emulation, but totally lacking any coherent support, I'm going to give it a 3.