GO-21 SciRPN icon

GO-21 SciRPN

Steve Lidie

4.9

12 ratings

$2.99

With this calculator app, you can perform scientific calculations using RPN logic and view register states. Includes stack management, keystroke logging, and copy-paste features.

AppRecs review analysis

AppRecs rating 4.7. Trustworthiness 68 out of 100. Review manipulation risk 25 out of 100. Based on a review sample analyzed.

★★★★

4.7

AppRecs Rating

Ratings breakdown

5 star

92%

4 star

8%

3 star

0%

2 star

0%

1 star

0%

What to know

Low review manipulation risk

25% review manipulation risk

High user satisfaction

92% of sampled ratings are 5 stars

About GO-21 SciRPN

GO-21 SciRPN simulates the venerable HP-21 Pocket Scientific Calculator from 1975. Virtually indistinguishable from the real item in operation, GO-21 is a powerful yet simple retro calculator.

• RPN (Reverse Polish Notation)
• 10-digit LED calculator display, 10-99 to 10+99
• Four stack registers with roll down
• One storage register with arithmetic memory operators
• Math, trigonometric, polar/rectangular, logarithmic, power and other miscellaneous functions
• One additional window with views of:
◦ stack/storage registers
◦ keystroke log
• Copy-from and Paste-to the calculator display
• Simple Paper Tape annotations
GO-21 SciRPN Screenshots
Screenshot 1Screenshot 2Screenshot 3Screenshot 4Screenshot 5Screenshot 6Screenshot 7Screenshot 8Screenshot 9Screenshot 10

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Reviews for GO-21 SciRPN

Ernie226

Hp-21 a constant companion !

I bought my HP-21 shortly after i saw it in Machine Design magazine in 1976. From then on it became my constant companion until appx 1995 or so when it gave up the ghost and would no longer illuminate. Much later on I was overjoyed to find an e-version replica of my faithful pocket resource, though he was no longer needed after I retired from field work. Today I have switched to Android apps and regret that I cannot find a replica of this trusty device,,,,, and would like to ask IF THERE IS ONE (?) or one under development? All iOS products havre become too expensive and unreliable !

Rbollo53

50 years later - Thank you

Many thanks for giving me the opportunity to use this RPN calculator. I bought my very first HP 21 C in 1972 when studying at Polytechnic School of Cameroon. 50 years later, I am still very happy and proud using RPN devices and programming Common LISP.

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