i41CX

I just love this app... I had an HP 41C, which got stolen :0( and this is a brilliant replacement at a fraction of the cost... the only thing I’d like to see would be the display of the Y, Z and T registers one above the other like on the HP 48SX’s extended display. Maybe that could be implemented in a skin? It’s also about a million times faster than the original!!!

The next best thing to an original, and I have 2. More convenient to carry though. Not as heart breaking to loose

I have an original HP 41CX that is still used every day and is still my first choice of calculator. I downloaded this app last week and it was just like using the real thing. I then upgraded to the i41CX+ I had an install problem that was quickly and efficiently resolved by tech support. Great App and great support. Totally recommended for anyone who needs an RPN calculator. Now one of my favourite apps.

Been a pleasure using this app, learning about RPN and classic HP type calculators. Can hardly believe how capable the 41 series was and still is. The virtual print and email output is brilliant and works well.

Once you've got used to an old-skool HP calc, you don't ever want to go back. It's great to know I'll have one at my fingertips for the foreseeable future.

This is a truly fantastic product with the most amazing level of support.

This is a great program! The interface is so well designed and uses all of the available screen space so that the numbers are readable for this old timer. In the HP tradition, this app exceeds expectations in both quality and performance.

Well done! $/feature/functionality it’s like buying a hand held super computer. Holy cow! Not to mention throw-back value for boomer generation :)

I have been using HP calculators since I bought a HP45 in about 1973 With HP mostly out of the Scientific RPN calculator area this app fills the need! Makes me miss my HP41CV I had (that died after many years of heavy use). Super customer service as well.

UPDATE - The display issue from v7.6.1 is fixed - via 7.6.2. The calc is now back to the great tool that it has been for quite a while and I look forward to continuing to use it for another few years. Thanks. PRIOR - The most recent update may have made for compatibility with the latest iOS (I haven't tried it yet on my iPhone and likely won't based on this experience) but it no longer works on my iPad that has an older iOS. The background graphics no longer scale up to the screen size so the touch points for the calc do not agree with the visual indications for the buttons. Avoid this version. Wait until it is fixed if you have an iPad with an older iOS.