HP 15C Scientific Calculator

MORAVIA Consulting

About this app

Developed by HP, the HP 15C Android Calculator App is an exact replica of the original layout, functions, algorithms and calculation sequences you trusted to help you through college and your career. When you find yourself without your HP 15C scientific calculator, relax – just open it on your favorite Android device.

Features:
-- Authentic app, developed by HP
-- Award-winning HP Support
-- Identical algorithms and calculation sequences as the original HP 15c Calculator
-- Modeled after the limited-edition 15c Calculator
-- RPN entry
-- Matrix calculations
-- Complex functions – real and imaginary
-- SOLVE key finds the root of an equation
-- Numerical integration
-- Programmable – up to 448 lines

Ratings and reviews

HP originally created this app and it is based on the original calculator ROM. I still have my old 15C and did not hesitate to purchase this app when it came out at a far higher price than most other calculator apps on the Play store. After almost 40 years, this calculator still holds its own for quick, easy, and accurate operation, and the interface works as well with touch as it did with the tactile buttons (which have never worn out). This is an old-school Reverse Polish Notation (RPN) calculator. If you love to have full control over your computations and in exactly what order things are done, with an eye on precision or the effects of rounding, and the thought of not having to input parenthesis brings joy to your soul, this may become the best calculator experience you've ever had. There are newer, graphic calculators out, but for sheer number crunching and fast input, nothing beats the old XYZT RPN stack that the 15C was among the last of HP's calculators to use. (Newer models had much larger stacks which made calculations with constants much more awkward if you are familiar with how the 4-element stack works). Because you control the operator precedence explicitly, It helps you develop skills for recognizing the innermost parts of equations quickly, even very complicated ones. Those skills have helped me do some incredible performance optimizations in work otherwise unrelated to this calculator. Matrix operations are simple and extremely fast, and there's a crib sheet for advanced but slightly cryptic operations on the back of the physical calculator that they've duplicated in the app with a simple press of the menu button. It also includes a PDF of the original owner's manual, which includes an RPN primer as well as some high quality tutorials on algebra, matrix algebra, and other areas that can help reinforce material currently being learned in school or just refresh fading memories. Plus it's searchable and in full color. RPN does have a learning curve, so if you're someone who doesn't like "different," this may not be your thing. But if this write-up has left you curious, give it a shot. I switched to RPN as a senior in High School decades ago and never looked back.

A++ Calculator. works great, no problems whatsoever. just like the HP 15C we used in college. love the simulated button feel (combo) motion / click sound when hitting each key. very smart calculator. All functions worked exactly like the 15C used in the day. perfect for finance, doing Bill's or tracking numbers. reverse logic input is perfect for inventory.5 and

I still have my original HP 15C from when I was in college decades ago, and it's still working. I installed this a few years ago as a backup just in case. I have used it quite a bit when l didn't have access to my original. The app works like a charm, just like the original. For those who have just downloaded the latest update and it has stopped working, go to the menu button and use the reset function. I had this happen to me just tonight but was able to reset it and it's working fine.