Great App but
I like this RPN emulation of my HP 15C and have been using it for several years but with the recent iOS updates, I have a problem turning it off on my iPhones (SE & 12 mini).
It works fine but swiping up does not make it go away like all apps are supposed to do. I have resorted to calling my iPhone and then swipe it off!
My iPads don’t have this problem.
Any help?Veluppan
Love this app
I love my 15C, which was my prized possession in college in the 80s. Still have it, though I’m missing the protective sleeve. This app allows me to take my 15C with me everywhere. Ahh, the joy of RPN!
Thank you, thank you, thank you Mr. Greg for creating this!Dm md234
Stuck on blinking display
Some calculations that exceed the display limit, like 70 factorial (70!) cause the display to blink. Once this happens, the only way to stop the blinking is to reinstall the app.
The pause function (PSE) does not work in a program.
There is no feedback to confirm key presses.RPN Forever
Obvious labour of love
This obvious labour of love, aesthetically and functionally perfect, so makes me wish I still had my original!Courtlandar
15c provides comfort
Using the 11 and 15c plus the excreble 12c, provides ease of mind during chain log calcs to divine output voltages in the dark. My fingers know where to go so I’m more confident in my results. Checking known old calcs reveals no errors so far - many thanks for this. Glad I kept my manuals. WTAudibellWT
Works beautifully
I’m so pleased to have a scientific RPN calculator again. This App works beautifully on both my iPhone and my M1 MacBook Air.oldhp11c
No support or key clicks
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!)
With my history of loving the HP15C, it pains me to write a poor review.
This app does not have key clicks, so it’s difficult to know if you pressed a key without feedback.
Checking the developer’s website, I can see that this developer has a true love for RPN & HP calculators. However, my main reason for a two star review is the lack of support for this product. The last version was four years ago!
There is a GREAT RPN APP, the FREE42. It is supported with recent updates on all devices & computers. I love it, please check it out.Rick, Honda Owner
Cannot close
After I use this calculator, which I love, I can’t close it. In order to get it off the screen I have to reboot the phone.3232j
Thrilled to have it
I still have my trusty 15C but it’s great to have this on my iPad. Just think: the real thing cost hundreds(?) back in the day and now it’s free!Laurelcreek
Can’t close app now
I’ve loved having this compliment to the HP-12C emulator on my iPhones...up until now. On my new 12 Pro Max, I have to reboot the iPhone to close the program. I sure hope this gets fix, but I’m not optimistic.RRammy
