Your Source of

HP Calculator Simulators

Since March 2011
 

 
 

 

Latest Updates

 2025-05-30: Vintage-45
2025-05-11: RPN-65 SD/Pro, RPN-67 SD/Pro, RPN-97 Pro
2025-05-10: Vintage-45, RPN-45 SD, RPN-45 HD
2025-05-09: RPN-35 SD, RPN-70 SD, RPN-70 HD



RPN on Silicon Macs

Note for iPhone users
 

 

Vintage Hewlett-Packard Calculators

I. The Programmables
 

 

RPN-97 Pro

iPad – V7.3

What's new?

RPN-97 Pro is the first complete simulation of Hewlett-Packard's
legendary HP-97 programmable calculator for iOS.
It is the only programmable personal desktop calculator ever built by HP.
The HP-97 was produced from 1976 to 1984.

Download hundreds of programs from this website for free.

RPN-97 Pro is the desktop version of RPN-67 Pro.
Please see the RPN-67 Pro section for

Details

 Runs on Apple Silicon Macs


External keyboard support (v1.2):

US Letter | A4
 

 

RPN-67 Pro

iPad – V7.3

What's new?

RPN-67 Pro is the first complete simulation of Hewlett-Packard's legendary HP-67
programmable calculator for iOS. The HP-67 was produced from 1976 to 1982.

Download hundreds of programs from this website for free.

Details

 Runs on Apple Silicon Macs


External keyboard support (v1.2):

US Letter | A4
 

 

RPN-67 SD

iPhone – V5.3

What's new?

RPN-67 SD is the iPhone version of RPN-67 Pro.
The full power of RPN-67 Pro for those times when mobility is essential.

Details

 Runs on Apple Silicon Macs


Short Programming Tutorial:

US Letter | A4
 

 

RPN-65 Pro

iPad – V4.3

What's new?

The first pocket-sized computer ever!

The HP-65 was produced from 1974 to 1977.

Download hundreds of programs from this website for free.

Details

 Runs on Apple Silicon Macs

HP-65 Owner's Handbook


External keyboard support (v1.2):

US Letter | A4
 

 

RPN-65 SD

iPhone – V4.3

What's new?

RPN-65 SD is the iPhone version of RPN-65 Pro.
The full power of RPN-65 Pro for those times when mobility is essential.

Details

 Runs on Apple Silicon Macs

 


 

Vintage Hewlett-Packard Calculators

II. The Non-Programmables
 

 

RPN-35 SD – The Pioneer

iPhone – V2.3

What's new?

A simulation of Hewlett-Packard's first and
ground-breaking scientific calculator HP-35 from 1972

Details

 Runs on Apple Silicon Macs
 

 

RPN-45 HD

iPad – V6.3
What's new?

A simulation of Hewlett-Packard's
scientific calculator HP-45 from 1973
with powerful enhancements 		Was ist neu?

Eine Simulation des wissenschaftlichen Taschen-
rechners HP-45 von Hewlett-Packard aus 1973
mit starken Erweiterungen


Continue in English


Weiter in Deutsch
HP-45 Owner's Handbook
Addenda
  		45 Bedienungs-Handbuch
 




External keyboard support (v1.2):

US Letter | A4

Runs on Apple Silicon Macs
 

 

RPN-45 SD

iPhone – V6.3
What's new?

A simulation of Hewlett-Packard's
scientific calculator HP-45 from 1973
with powerful enhancements 		  Was ist neu?

Eine Simulation des wissenschaftlichen Taschen-
rechners HP-45 von Hewlett-Packard aus 1973
mit starken Erweiterungen


Continue in English

  


Weiter in Deutsch
 

Runs on Apple Silicon Macs             
 

 

Vintage-45

iPhone – V3.0
What's new?

A simulation of Hewlett-Packard's
scientific calculator HP-45 from 1973		   Was ist neu?

Eine Simulation des wissenschaftlichen Taschen-
rechners HP-45 von Hewlett-Packard aus 1973
 
HP-45 Short Manual   HP-45 Kurzanleitung

English | Deutsch | Français
Double-tap display for instructions
Anzeige doppeltippen für Instruktionen
Appuyez deux fois sur l'écran pour obtenir des instructions

Runs on Apple Silicon Macs               
 

 

RPN-55 SD

iPhone – V3.1

What's new?

RPN-55 SD is the first complete simulation of Hewlett-Packard's
timer-equipped, programmable calculator HP-55 for iOS.
The HP-55 was produced from 1975 to 1977.

January 2025: Celebrating the 50th birthday of the HP-55 !

The last of HP's "First Generation Handheld Calculators"


Details

 Runs on Apple Silicon Macs

 


 

2nd Generation Hewlett-Packard Calculators

II. The Woodstock Series
 

 

RPN-25 CE

iPhone – V5.2

What's new?

A simulation of Hewlett-Packard's wildly popular second-generation
programmable scientific calculator HP-25(C) from 1975(76)

Details

 Runs on Apple Silicon Macs
 


 

3rd Generation Hewlett-Packard Calculators

III. The Spice Series
 

 

RPN-32 CE

iPhone – V4.1

What's new?

A programmable simulation of Hewlett-Packard's third-generation
scientific calculator HP-32E/C from 1978

Details

 Runs on Apple Silicon Macs
 

 

RPN-34 CE

iPhone – V2.9

What's new?

A simulation of Hewlett-Packard's third-generation
scientific calculator HP-34C from 1979

Details

 Runs on Apple Silicon Macs
 

 

RPN-38 CX

iPhone – V4.0

What's new?

A simulation of Hewlett-Packard's third-generation
programmable financial calculator HP-38C from 1978

Details

 Runs on Apple Silicon Macs
 

 

Get the Spice Series calculators at a bargain:

The Spice Pac

(includes RPN-32 CE and RPN-38 CX)

The Spice Pac Plus

(includes RPN-32 CE and RPN-34 CE and RPN-38 CX)
 


 

Vintage Hewlett-Packard Calculators

IV. The Freebies
 

 

FREE — GRATIS:

RPN-70 HD

iPad – V3.3

A simulation of the very rare
financial calculator HP-70 from 1974		  
Eine Simulation des sehr seltenen finanziellen
Taschenrechners HP-70 aus 1974
 
Handbook / Online Guide / Examples   BA / Kurzanleitung / Beispiele

Runs on Apple Silicon Macs
 

 

FREE — GRATIS:

RPN-70 SD

iPhone – V3.3

A simulation of the very rare
financial calculator HP-70 from 1974
(replaced by HP-22 in 1975)		  
Eine Simulation des sehr seltenen
Finanzrechners HP-70 aus 1974
(1975 ersetzt durch den HP-22)
 
Handbook / Online Guide / Examples   BA / Kurzanleitung / Beispiele

Runs on Apple Silicon Macs
 

 

FREE:

RPN-67 NP

iPad – V3.0

RPN-67 NP ("Non-Programmable") is the first simulation of Hewlett-Packard's legendary HP-67
programmable calculator for iOS. The HP-67 was produced from 1976 to 1982.

This free version comes with 25 sample cards, marked in the Libraries.
It is not programmable.

Details (Pro version)


Runs on Apple Silicon Macs
 


 
M1 Chip

Running RPN Calculators on

Apple Silicon Macs

  
 

 
Marked RPN apps may installed on Macs equipped with an M1 / M2 / M3 / M4 chip ("Silicon Macs").

Notes:
• Downloading the app from the App Store is free if you already own the iOS version.
Just keep going ahead in the buying process; you won't be charged again.
• Set the View options as desired. Try Full Screen and Zoom to Fit.
• You can copy/cut/paste freely between the Mac and the iOS apps. Sharing is also supported.
• You can use the Mac's keyboard on these apps: RPN-45 HD, -65 Pro, -67 Pro, -97 Pro.
Just make sure the option Touch Alternatives (in the Finder's Settings for the app) is set accordingly:
– Off to use the Mac's keyboard.
– On to enable deleting table rows by swiping left.
• NOTE:
(As of Nov 2024, the problem described below may have been resolved on the latest macOS systems.)
Printing doesn't work reliably in all cases. The app may hang, with the printer dialog never showing up.
If this occurs, quit the app (from the dock) and restart it. Tap the calculator keys STO, then CLx.
This removes the printing commands (on Macs only.)
They may be restored anytime with the same key sequence.
• In the Card Manager, search options (Titel/Descr./Instr.) are not available.


RPN-25 CE running along RPN-97 Pro
on a MacBook Air M2
 
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