Leave a Review MathU RPN Calc
Love this calculator!
This is my daily go-to calculator. It's also my absolute favorite HP emulator! It does everything I need from a calculator. Great combination of functions! Anyone who used the older vintage HPs will appreciate this calculator. Thank you Dr. Thompson for keeping this app current!Bearcreekmom
Awesome calculator!
I use this calculator on a daily basis and absolutely love it. I have been a fan of HP calculators since the 80’s and glad I found this app a number of years ago.MyOpinion70
Superb
I’ve used RPN since my first HP calculator 50 years ago. This app is a superb duplication of the original and looks just like the original keyboard. Perfect for all my scientific needs.DrRonsrq
Great calculator
Been using for many years. Has surpassed my HP calculator for most purposes, though the H-P works great. RPN is the only way to go for engineering calculations. Learn it and you’ll never touch an arithmetic calculator again jCummingJim
Love this calculator!
This is my daily go-to calculator. It's also my absolute favorite HP emulator! It does everything I need from a calculator. Great combination of functions!
Anyone who used the older vintage HPs will appreciate this calculator. Thank you Dr. Thompson for keeping this app current!Really great RPN calculator
I have been using this calculator for years and found it flawless for a RPN calculator. Reverse Polish Notation (RPN) calculators take less keystrokes than an algebraic version to complete a series of calculations.
This calculator faithfully executes the HP look and feel for those wanting combined scientific and business functions in one app. I cannot praise this calculator enough.Show lessbiz217
I love this calculator.
For those of us that used RPN calculators from HP all through high school and college, this is a brilliant and familiar implementation of that model.Mike_12
Best RPN calculator
This is the best RPN calculator I've found. Have been using it for ages.
There's an issue with the last update on my iPad mini: I'm not able to access the settings anymore. The dialog will pop up, but tapping settings (or Quick Reference) won't do anything.
A very personal preference: turn off display of the financial registers or replace it with first 5 regular registers. I don't use the financial functions that frequently so it's just distracting.Show lessPhoibos
Developer Response
The quick reference problem was fixed in 2020. Also, the financial registers can be used to display any numbers you want. Just use STO or RCL followed by the financial function key (like PMT) to store a number there.Great workhorse of a calculator
I have used this RPN calculator for many years and what can I say other than it works. The iPad version has some bugs with the settings and help that need to be resolved.Geodov
Help doesn't work
Click help, app freezes, doesn't seem to work on iOS 8Kevin D’Elia
