Fantastic app.
It's the default calculator on my iPhone & iPad home screens.
October 2017 update: still loving it. Still 5⭐️
October 2017 update: still loving it. Still 5⭐️
Amazing. Clearly a labor of love.
Really happy he continues to develop this calculator app. It's pretty much the most feature-rich option you'll find and the updates continue after so many years. Very few apps see as much development over the years as this one and it deserves your purchase if you're on the fence. So happy it continues to be developed.
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A Flawless Emulation of the Classic RPN Calculator
The emulation works perfectly. Bells and whistles are available but don’t interfere with the functionality. I haven’t tried any of the bells and whistles so I can’t speak to their utility. But I am happy to testify that the full functionality of my beloved old Hewlett-Packard calculator now runs flawlessly on my iPods and iPads. No doubt it works on an iPhone also, but I don’t use an iPhone. Thank you to the developer for this gem.
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Excellent stuff!
A flawless implentation. Works exactly like my 41cx. Would recommend to anyone who wants a functional programmable calculator on their iphone. Or to anyone who used to (or still does) own one of these classic hp calculators.
So good I use it as my go-to calculator on my iphone.
Looks very good on iPhone 6 Plus!
So good I use it as my go-to calculator on my iphone.
Looks very good on iPhone 6 Plus!
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Great
This was expensive and I'll probably never use more than 10% of the facilities, but it is obviously a labour of love for the creator and for that it deserves credit. So far on my iPod Touch 6 with IOS8.4 it seems stable.
Perfect!
I love this app. Brings back the best programmable calculator ever made! I use it all the time.
Excellent App and support
Well worth the price and superb support. Very well made. Keep it up!
The HP-41CX, and Then Some!
It’s a testament to the affinity people have to the HP-41CX calculator that someone would develop an app that is not only a faithful reproduction of this venerable calculator, but actually improves upon it. Downloading and setting up the i41CX+ is a breeze. The modules are a snap to import. The documentation is clear and easy to understand. I was able to easily import my personal programs into the i41CX+ on my iPhone, then export them to emails, and then import them from the emails into an iPod Touch that I also use. I'm glad to be able to easilly backup my programs on email. The app makes it extremely easy to do.
The HP-41CX got me through my electrical engineering curriculum. Having the i41CX+ easily accessible on my iPhone and iPod Touch makes me feel like I have an old friend back. Thank you, thank you, thank you for this app!
The HP-41CX got me through my electrical engineering curriculum. Having the i41CX+ easily accessible on my iPhone and iPod Touch makes me feel like I have an old friend back. Thank you, thank you, thank you for this app!
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Keeps getting better
I lost my HP41, got this app and the fantastic implementation makes it probably one of my favorite apps on my iPad. The sidebar printer is a lot more useful than I first thought it would be.
The best HP41CX available.
The i41CX+ is a FANTASTIC HP41CX emulator, complete with 'plug in' modules and 'keyboard overlays'.
I own four original HP41 calculators and a fair number of modules - but even the most reliable of these 30+ year-old electronic devices occasionally 'crashes' and loses data/programs. This app allows the user to avoid the frustration of malfunctions, while still enjoying the versatility of this ( relatively ) powerful, and ( definitely ) historic, computing device.
Sure, even the cheapest, weakest, PC available today can do WAY more than a HP41CX can do, and do it much more quickly. But these old calculators required you to really use your brain to plan out programs utilizing limited memory and program steps. Sometimes I have fun trying to think of new ways to solve problems within the calculator's limitations - I also like the notion that I'm using the same device NASA chose as the back-up for the Space Shuttle's computer navigation system.
I just wish the App Store had charged me the 'upgrade' price, instead of the full purchase price, since I previously shelled out $7.99 for the basic i41CX app. I'm not sure what went wrong in the purchase process, but I was definitely overcharged.
So, five stars for the great calculator app;
and, at most two stars for customer service.
I own four original HP41 calculators and a fair number of modules - but even the most reliable of these 30+ year-old electronic devices occasionally 'crashes' and loses data/programs. This app allows the user to avoid the frustration of malfunctions, while still enjoying the versatility of this ( relatively ) powerful, and ( definitely ) historic, computing device.
Sure, even the cheapest, weakest, PC available today can do WAY more than a HP41CX can do, and do it much more quickly. But these old calculators required you to really use your brain to plan out programs utilizing limited memory and program steps. Sometimes I have fun trying to think of new ways to solve problems within the calculator's limitations - I also like the notion that I'm using the same device NASA chose as the back-up for the Space Shuttle's computer navigation system.
I just wish the App Store had charged me the 'upgrade' price, instead of the full purchase price, since I previously shelled out $7.99 for the basic i41CX app. I'm not sure what went wrong in the purchase process, but I was definitely overcharged.
So, five stars for the great calculator app;
and, at most two stars for customer service.
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