Brilliant!

Ive owned a real one (used it up) and this is in many ways is better. For one, you can make it go faster than a real one!
I was surprised at how quickly I could still type and program on this. For programming a handheld device actually on the handheld device, the keystroke programming calculator model is far superior to regular programming languages, and there was never a better calculator than the HP 41. The ability to chain little related programs, or call them from each other gives you tremendous flexibility to gain a little mathematical insight on the go. I feel like my phone has 10 times the utility from just this one app. I have my old friend back! Yay!

CITev about i41CX, v4.8.8