United Statesi41CX is the same powerful advanced programmable RPN scientific calculator as the highly acclaimed i41CX+ but without the latter’s incredibly advanced capabilities such as the printer, expansion, CAS, etc. It is functionally equivalent to the world-renowned HP-41CX and inherits all of the i41CX+ usability features including extremely responsive and animated key clicks, audible key feedback sounds, optimally spaced keys for accurate input, traditional and upbeat modern diverse set of skins, etc. If you are looking for a powerful programmable RPN scientific calculator but don’t need all of the capabilities of i41CX+ then i41CX is for you. And best of all, if you ever decide that you need the more advanced capabilities of i41CX+ you can enable them using secure in-app purchases right within the app! FEATURES: • RPN logic with a 4 element deep memory stack • 319 main and 124 extended memory registers • Over 300 built-in functions, including nearly 100 functions created specifically for i41CX • Time, calendar, alarm, and stopwatch functions • Rich set of functions and algorithms: numerical, mathematical, statistical, and much more • Access to the entire HP-41 library of solutions for science, mathematics, statistics, engineering, business, financial, surveying, medicine, real estate, and many other domains • Programmable - Over 2000 lines • User definable keyboard • Ability to operate the calculator using a Bluetooth keyboard • Device integration: external display mirroring, copy and paste, GPS, accelerometer, digital compass, time and date synchronization, and much more • iOS 8 Notification Center widget • Sound support including synthetic tones and interface sounds • Support for calculator skins and optional mini stack display • Adjustable sound volume and display colors • Usage & Examples table with usage tips and examples • Quick reference guide of all built-in functions • Beautiful and clean user interface *********************************************************** A comprehensive FAQ is available at http://alsoftiphone.com/i41CX. Please don't hesitate to use the "Contact Us" link there if you cannot find the answers or information that you seek. Thank you.
Masterful reincarnation of the original !
Well done! $/feature/functionality it’s like buying a hand held super computer. Holy cow! Not to mention throw-back value for boomer generation :)
United StatesThis is a great app!
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.
United StatesPerfect. 100% accurate emulation!
I used an HP-41 series calculator since I was a teenager. Wrote lots of great programs for my various endeavors. Alas, my 41 was stolen when I was in my 30s and I never could justify the huge prices used ones were bringing. So I made do with my little 11c, and later with a gifted 48sx. Then I found this. WOW. Within days I bought the i41CX+ upgrade, and dug out some of my old program listings. Everything still worked! Try as I might, I couldn't find a single weak spot. It's a real 41cx! Over the years, it's only gotten better. I don't care much about skins or colors, but the overlays (particularly the dynamic overlay feature that turns the overlay on only when the user keyboard is selected) are a luxury I never had with my hardware calculator, and I have access to just about every ROM ever made for this machine. I got so happy with it I bit the bullet and bought a used HP-41CX, so now I have the best of both worlds. If you're a 41 nut like me, GET THIS.
United StatesLatest Update Caused Problems - Now Fixed!
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.
United StatesMazel Tov!
I wore out my HP-41 calculator but it was the thing that brought me back to programming after a nauseating experience with FORTRAN 77 in 1981. I wrote nearly 200 programs on that calculator. It got me through engineering school, taking the PE, working on the Hubble, B2, and 7x7s. I’m glad to have it back, even just as a calculator. I’m curious: Can I still write a subroutine to cause the calculator to automatically shut down when I turn it on using flag 11?
United StatesThe REAL thing...
Latest speed enhancement is phenomenal! Thank you. Now if we can have it always “ON” when it comes up, then it would be perfect! Is there a setting that would have turn on automatically when it starts?
United StatesLOVE IT and no buying N size batteries
Love it love the way the case looks 35 years using one now have it on me
United States
• Minor bug fixes
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