Brilliant
I love the ability to see the printout and values in the stack/registers. The real calculator was great, this is better. Thank you
Absolute best
I have been using this calculator for years - it is incredibly helpful in my work… it is perfectly implemented, mimics the original HP41 calculator (I still have it) but with this I have it with me everywhere. I hope the developer will keep this app going for a very long time! Thanks for this incredible calculator!
Show less
Best and most useful app I have ever purchased!
Amazing! The best calculator in history fully replicated for the iPhone. I bought it when it was first introduced and it has been used daily ever since! The author has kept it current and support is great!
Building on a classic calculator
I still have my 41CV, and this app is not only an uncanny replica, but goes above and beyond the functionality of the original. My favourite feature is the mini stack - much nicer than rotating each frame into view! The only thing that could possibly improve this app IMO would be a 3D perspective of the buttons animated by the iPhone inclinometer (in the vein of the Labyrinth 2 app)!
Show less
The best App on my iPhone
I have owned HP41, HP41CX and programmed extensively and just recently started to program within this App. It was even easier than using the original after I found the keyboard appeared when pressing ALPHA. A truly remarkable implementation.
If I could give more than 5 stars I would. It is one of the main reasons I keep my iPhone.
If I could give more than 5 stars I would. It is one of the main reasons I keep my iPhone.
Show less
Amazing and useful and fun
I used an HP41c in college, and found it so useful and intuitive. All these decades later, I LOVE this app. It brings back some great memories, but it’s mostly VERY useful.
I also love how exactly it replicates the HP41c experience! The look is perfect and I smile every time I use it.
I’ve never had a problem with its functionality either.
100% recommended!!!
I also love how exactly it replicates the HP41c experience! The look is perfect and I smile every time I use it.
I’ve never had a problem with its functionality either.
100% recommended!!!
Show less
Great app for a great Calculator
This is truly a great app that mimics a great calculator. The only thing missing is the awesome key feel of the originals. If you were an engineer or a scientist anytime in the late 80s or 90s a 41 CX or CV was your trusted problem solving tool. If you tried synthetic programming to get the most out of your CX you will like this app. Full access to all the expansion modules you couldn’t afford back in the day, are available.
** Note for developer please make this available for Macs running Monterey**
** Note for developer please make this available for Macs running Monterey**
Show less
Great!
I still use a 41cv and 42cx; there has never been anything else comparable. Very pleased to find this excellent app for the phone; highly recommended!
As an aside, I paid over $500 for the cv in Spain in 1981 and it still works.
As an aside, I paid over $500 for the cv in Spain in 1981 and it still works.
A true implementation of a fantastic calculator
I still have my 41cx but this has now become my goto calculator. Supports all you would expect including synthetic programming assembler, ppc to name but a few. Worth every penny. Thank you for this first class implementation.
Key Clicks
Key clicks suddenly stoped working, only on I41 app?
Running latest version on iOS 14.7.1
Running latest version on iOS 14.7.1
