11C Scientific Calculator ٤+

I purchased my first 11C probably around 1976 or so on the recommendation of my engineering student brother who explained the advantages of RPN to me. The transition was easy since I was not a calculator user prior to its acquisition. I have three now, one at home, work, and on my boat. I have been a machinist for 35 years so the one at work sees the lions share of use. I am absolutely thrilled to now have it on my phone so I have instant access to it 24/7 regardless of my location. The majority of my use is simple number crunching and trig functions so I could not be considered a power user or expert on it but I am absolutely happy and satisfied with this app on my phone. Now when at work if I am standing in front of a machine tool and want to add or subtract two numbers I whip out my phone rather than walk the 30 or 40 feet to my office and back. I am highly protective of my beloved 11C so it rarely makes an appearance on the shop floor for fear of being damaged or destroyed.

My 1981 is still working like new, but sure doesn’t look it. This app makes my iPhone and iPadmini just as good as the real thing. For several weeks I did all kinds of stuff on it to see if it had any flaws/errors.
Zero !!! and I love it as much as my original.
One minor annoyance; when I hit prefix to see all digits, it just flashes the digits too fast for me to read. My old HP showed it as long as I held the button. But still a 5+++
Thanks for the exceptional re-creation.

I used the HP 11C in college in my engineering classes. I continued to use the same calculator when I secured my first job, but the buttons began to stick. Then I found this app for my phone. It worked wonderfully well. Well, until my new phone wasn’t compatible anymore. I have waited over a year waiting for the upgrade. And finally IT’S HERE AND IT WORKS LIKE MY OLD HP 11C. Thank you, thank you, and thank you.