THE best calculator app
The HP42s is one of the best calculators ever made. I love Free42. Plus42 is even better, which I was happy to buy to support the development of both apps.
One request
Big fan from forever ago. Had free42 on all my PalmOS devices, Android, PC, and i0S since my IPhone 1. However, the current version on iOS has the oldest built-in skins instead of the newest ones. Please fix?
Super
Use a 42s on my desk since many years. Nice to have one with me all the time! Thank you very much!
Works great
Wish there was a 41 CV version to replace my real one. But this is a good replacement.
Response from developer
I'm glad you like Free42, but if you're specifically looking for an HP-41CV or CX emulator, i41CX is a good option.
Would recommend
This is an awesome RPN calculator, and does all the things you need and more.
Best free app for thinking people
This app is a service to mankind. Especially if you only speak RPN.
Fantastic!
So nice to have this available. I have always been a diehard HP RPN calculator fan. This app is a faithful and convenient reproduction.
Square root function not working
Not sure why, but the square root function doesn’t seem to be working properly now. Was working okay before. Not sure if other functions are also impacted. Used to love this up until this happened
Response from developer
It sounds like you're in BASE mode. Press EXIT repeatedly until there is no menu in the display, that should get you back to normal. If that's not it, please contact me via email. It is a bit difficult to do tech support in review replies.
RPN Rules
My physical HP calculator died after 36 years and like many old engineers (I suspect), I wouldn’t use anything else. I tutor high school kids, with their TI 83’s and 84’s. Even though they can text much faster than me, an RPN calculator runs circles around them.
This app is a perfect replica and I urge anyone who is allowed to use an iPhone to try it. It takes about 20 minutes to get used to a completely different way of operating, but you won’t ever go back to algebraic entry.
This app is a perfect replica and I urge anyone who is allowed to use an iPhone to try it. It takes about 20 minutes to get used to a completely different way of operating, but you won’t ever go back to algebraic entry.
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Fantastic App!
I have always used HP RPN calculators spanning a period of over fifty years and this App is a faultless rendition of the original calculator.
One really niggling problem is that the screen has rotated 90 degrees to landscape. Trying to get it back to portrate does not work. Any ideas? Any fix coming?
Ray Shead
One really niggling problem is that the screen has rotated 90 degrees to landscape. Trying to get it back to portrate does not work. Any ideas? Any fix coming?
Ray Shead
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Response from developer
Please contact me via email.
Thank you, thank you!!!
I’ve been using my hp42 since buying it the day it was in stock for sale. Its a one-owner! On back it says 1987 Made in USA. SERIAL No …A11141. I digress. Some of my keys have started to act up after 36 years of perfect service. Finding Free42 is a godsend! I’m running it on an iPhone SE. I re-entered some really old programs I’ve kept on my 42s and they work flawlessly. I am so grateful you’ve created this app. Thank you, thank you!
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Love this calculator
I’ve been a fan of RPN for over 40 years. This calculator works great. I don’t typically use it for much more than simple calculations but I use it daily. I absolutely love the haptic feedback with key presses. It’s gives great indication when you’ve typed a number.
Great app
Terrific!
Calculator
I’ve had a HPC 12 for years, and it was very simplistic to work with.
This calculator is very complex and not easy to use.
Does it even come with an instruction manual?
This calculator is very complex and not easy to use.
Does it even come with an instruction manual?
I love it!
Thanks for writing this lovely peace of software!
Great RPN Calculator
I first started with my first RPN calculator when I worked in electrical engineering in the eighties with my HP15C. I used it very extensively, writing time saving programs for my job. (Also, the approximately $90 or so purchase price at the time, with a young family really hurt!) Although, my present position for the last twenty years doesn’t require anything advanced, RPN is still my first choice for a calculator. The “Free42” RPN calculator is easy to use & works well. I’m sorry to say that I haven’t used very many of the advanced functions. I have also loaded the windows version on my computer at work, with a skin that is similar to the HP15C (for sentimental reasons…). Also browsing the developer’s website, I was surprised to see that this software was created in 2004, has had many updates & is available for android, iPhone, Windows, Linux & Mac. Looking thru the updates listed on his website, this developer is very committed to this product. (it’s sad, my real HP15C calculator is just gathering dust in my dresser top junk drawer, half the time, the batteries die due to drainage from lack of use, it’s just too easy to reach for my iPhone that’s already in my pocket) My only complaint is the name. Free42 makes this product sound cheap & junky, it is not! Please consider a better name.
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Richtig guter Taschenrechner
Auf meinem Schreibtisch liegen seit fast 30 Jahren Taschenrechner von HP. Am häufigsten nutze ich den HP 32Sii. Mit der App muss ich auch unterwegs nicht auf den Komfort eines RPN-Taschenrechners verzichten, sondern habe ihn allzeit griffbereit dabei.
Neu: Mit dem Plus42 gibt es jetzt einen großen Bruder des Free42, der das große Display neuer iPhones optimal ausnutzt. Den sollte man allein schon kaufen, um die großartige Arbeit des Entwicklers zu würdigen.
Neu: Mit dem Plus42 gibt es jetzt einen großen Bruder des Free42, der das große Display neuer iPhones optimal ausnutzt. Den sollte man allein schon kaufen, um die großartige Arbeit des Entwicklers zu würdigen.
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Needs shake to clear stake
Terrific, but will get 5 stars when it has the shake to clear stack that 42S had. But this app is 64 bit and 42S is out of the app store.
Needs getting used to
The RPN style of.calculators needs some getting used to. No ads and no paywalls are some bonuses if you are willing to get your hands dirty.
I feel so guilty.
I’ve been using Free 42 for years, I’ve never paid a penny! I paid for other HP emulators that I only sparingly used before deleting.
At least add a menu item in ‘about’ that we can buy you a coffee!😊
At least add a menu item in ‘about’ that we can buy you a coffee!😊
Response from developer
For donations, I have a PayPal link on my web site. Or maybe you would also enjoy my other calculator app, Plus42. Thank you!
