Leave a Review i41CX
No longer works
This app no longer works. It needs to be updated. Too bad because this was my favorite calculator.Gunnerbeast
Yeah !! Haptic feedback
Great calculator that is now perfect with haptic feedback. Been waiting on this for years. Now much easier to ensure you hit the right keysJeffcincy
Fantastic
I bought an HP-41 for the first time in 1981. Still have it. It was the best calculator money could buy (and it was expensive!). This app works EXACTLY like my physical HP-41. The attention to detail is incredible. I was thrilled when I found this app and gladly paid for it.jerrylanejohns
Magnificent Emulation
With real programmability like the original (now nearly 40-years old), you should have little difficulty transitioning to the iPhone version. Fish out the original manual if you're rusty (it isn't supplied), and yes, you can upgrade in-app for the emulated plug-in packs (nothing to download, as they are already built-in, awaiting payment).Show lessAardvark1917
If you use a HP RPN calculator, this is for you!
I regularly use a HP calculator for engineering calculations, and once I got used to Reverse Polish, I've found RPN simplifies complex string calculations. This app provides a pretty much flawless emulation of the great HP 41CX. It's great for quick calculations, rectangular/polar conversions, etc. AND - I don't have to carry around a separate device - it's on my phone.
If you don't need to graph functions (and most of us rarely do) AND like RPN, this is a great app.Show lessDoggydog8
A Dream Come True
When I purchased an HP-41C in 1980 (?) it was the most advanced calculator on the market. Programmable and using RPN logic, I enjoyed developing programs for science projects. This version duplicates much of the original device and adds advanced capabilities. Though replacing a couple of algebraic based calculators, this i41Cx is my choice along with a graphing computer.Show lessInvisible Ed
Best calculator ever
I grew up with an HP41 CV through 4 years of Physics classes. This calculator is the closest match and does everything that I used to doMarmoset Killer
Amazing!!
This is a wonderful app that both looks and feels like the HP41CX. I ended up getting some in app upgrades, and may have chosen the more expensive i41CX+ had I known the app was this good. It is especially useful to people who have used the HP41 series calculators. Very helpful tech support!Revrunning
Welcome back 41C - perfect!
If you loved your hp41c and have been missing it, here it is. This is an exact replica of that greatness and it is perfect. If you do not know 41C but curious about rpn, this is it!Mehmet Ozturk
Really an HP calculator
Works just like my old calculator, except from my phone. I wished they had changed the original digits, because they were not easy to read to begin with.arj2006
