Better than the real thing!
I have used the 12c since it was first sold by HP. I used its predecessor model, too. I use HPs virtual version on my laptop.
This app is a seamless improvement on a classic design. Take this from a retired financier, this is the best financial calculator app! Update: Still using it with iOS 10.
CD Wyte about
MathU 12D Financial Calculator, v2.0.1