My dad uses this one: http://thomasokken.com/free42/
But I can't tell you how good it is, I just know he uses it because he's a total RPN nerd.

None.

You might consider Microsoft Mathematics (it's free):

https://www.microsoft.com/en-us/download/deta … s.aspx?id=15702
https://en.wikipedia.org/wiki/Microsoft_Mathematics

(RPN nerds rule, btw. Still using my HP-41CV)

keenmaster486 wrote:

My dad uses this one: http://thomasokken.com/free42/
But I can't tell you how good it is, I just know he uses it because he's a total RPN nerd.

Good one. Will try the Android version - looks really good. I still have the original of course 😉

I liked the XP Powercalc, but apparently it is not so easy to install in Windows 7.

so what is even desirable when it comes to calc? i kinda always was a bit lazy and went straight to python

I use pcalc, but I think it's only for IOS and MacOS.
On Windows 7 I copy the old calc.exe from an XP computer and put it on the Windows 7 desktop.

A Casio fx-85SA.

I use reality and a Sharp DAL.

http://speedcrunch.org/

skitters wrote:

On Windows 7 I copy the old calc.exe from an XP computer and put it on the Windows 7 desktop.

AFAIK Vista's calculator has better precision while still looking like XP.