Complex RPN Calculator Reviews

Free, simple, functional, no ads or in-app purchases. Awesome.

jimpudar

So far so good on iPhone SE.

Good RPN Calculator

IP3uset

The design is clean and it’s RPN. It would be nice if it showed the stack but that’s my only quibble.

Calculator doesn’t work

Kirk201299

This no longer works with the latest iOS software. I paid good money which is now lost!

I have beening using RPN logic calculators since the HP-35 in 1972. When the reviewer here complained about the missing "equal" key It brought back early memories of people asking me the same thing about my HP-35, the fact is no RPN calculator has one. When solving a problem you don't, as in an AOS system enter 2+2=4, instead you do 2 enter 2 + and that eguals 4. This doesn't seem to make much since until you start getting into a complex calculations and are able to solve it just as you might do it on a chalkboard working from the inside out, being able to see the results of each step before finally seeing the final answer. Several decades ago I schooled a high school math teacher in the use of an HP RPN calculator. This teacher had a blanket ban on calculators in his classes feeling they where a cheating tool. Once he understood RPN logic he realized its' resource as a teaching tool because it teachs how to solve a problems as illustrated in a text book, and by preventing you from entering something in the wrong way. To any student out there that is learning higher mathmatics for the first time I highly recommend this App using RPN logic will pay off in better understanding and better grades. The fact this App if free is just icing on the cake. I agree with the one reviewer being able to see the "stack" would be really nice.

Great & for free too!

BobFelix

It doesn't have a = sign??? What is it about RPN you don't understand?

Great for complex calculations

Scrumblator

The ability to do complex number calculations (for free!) coupled with the RPN notation make this an excellent calculator. Definitely a keeper app. My only suggestion is to make it start faster.

A keeper

In Situ

Ah, I miss my old HP calculator! My only suggestion would be to please show the stack!

Good 15C emulator

Stress hacker 101

HP should bring back the 15C! Also the comments on no equal key are hilarious.

Great Application

Lastnoel

This is an excellent well written application. Would not change a thing. I have been using HP calculators with Reverse Polish throughout my engineering career and this app totally emulates it. Way to go developer.