RPN Calc
$0.99
13.0.0for iPhone, iPad and more
Age Rating
RPN Calc Screenshots
About RPN Calc
A simple reverse polish notation calculator loosely based on my trusty HP-32SII that runs on iPhone, iPad, and Apple Watch!
If you are familiar with HP RPN calculators, the operation of this calculator should seem very straightforward - albeit simplified. It can't be programmed, and it doesn't handle binary, or hexadecimal numbers.
But, it has a clean, simple interface with large, easy to press buttons. It has all of the functions required for quick calculations when your iPhone is handier than your computer or calculator.
And, remember those cool calculator watches from the 1980s? Unfortunately, none of them were RPN. RPN Calc brings a reverse polish notation watch calculator to the Apple Watch!
In addition to the standard RPN Calculator app that runs on iPhone, iPad, and Apple Watch, RPN Calc includes a handy micro RPN Calc Today Extension available for convenient access to quick calculations from the pull down Today screen.
If you are familiar with HP RPN calculators, the operation of this calculator should seem very straightforward - albeit simplified. It can't be programmed, and it doesn't handle binary, or hexadecimal numbers.
But, it has a clean, simple interface with large, easy to press buttons. It has all of the functions required for quick calculations when your iPhone is handier than your computer or calculator.
And, remember those cool calculator watches from the 1980s? Unfortunately, none of them were RPN. RPN Calc brings a reverse polish notation watch calculator to the Apple Watch!
In addition to the standard RPN Calculator app that runs on iPhone, iPad, and Apple Watch, RPN Calc includes a handy micro RPN Calc Today Extension available for convenient access to quick calculations from the pull down Today screen.
Show More
What's New in the Latest Version 13.0.0
Last updated on Jan 25, 2024
Old Versions
- Interface refreshed and updated with a clean, modern design!
Show More
Version History
13.0.0
Jan 25, 2024
- Interface refreshed and updated with a clean, modern design!
12.0.8
Jul 26, 2023
- Update for Apple Watch Ultra
12.0.7
Jan 14, 2022
- Minor bug fix.
12.0.6
Oct 14, 2021
This app has been updated by Apple to display the Apple Watch app icon.
Updated for the new Series 7 Apple Watches!
Updated for the new Series 7 Apple Watches!
12.0.5
Oct 13, 2021
Updated for the new Series 7 Apple Watches!
12.0.4
Jun 3, 2021
Minor bug fixes
12.0.3
May 25, 2021
Minor bug fixes.
12.0.2
Apr 6, 2021
Minor bug fixes
12.0.1
Jan 20, 2021
Watch App display settings can now be set from the new display menu!
12.0.0
Oct 17, 2019
Updated for iOS 13, WatchOS 6, and the new iPadOS 13!
- Support for dark mode display on iPads.
- Supports running as an independent app on WatchOS 6.
- Numerous minor user experience tweaks and improvements.
- Support for dark mode display on iPads.
- Supports running as an independent app on WatchOS 6.
- Numerous minor user experience tweaks and improvements.
11.0.0
Dec 10, 2018
Updated for the new iPhone Xs, Xs Max, and Xr along with the new iPad Pros!
10.0.4
Aug 13, 2018
- Bug fix
10.0.3
Nov 28, 2017
- Updated for iOS 11 and the new iPhones!
10.0.2
Nov 13, 2017
- Updated for iOS 11 and the new iPhones!
10.0.1
Nov 2, 2017
- Updated for iOS 11 and the new iPhones!
10.0.0
Oct 30, 2017
- Updated for iOS 11 and the new iPhones!
9.0.3
Sep 19, 2016
- New quick launch complication for Watch app!
- Minor bug fixes.
- Minor bug fixes.
9.0.2
Aug 1, 2016
- New quick launch complication for Watch app!
- Minor bug fixes.
- Minor bug fixes.
9.0.1
Oct 12, 2015
- Bug fixes.
9.0.0
Oct 6, 2015
Remember those cool calculator watches from the 1980s? Unfortunately, none of them were RPN. RPN Calc brings a reverse polish notation watch calculator to the Apple Watch!
The new RPN Calc Watch app is fully native for iOS 9 and WatchOS2, and brings speedy, immediate performance, along with a new unit converter for convenient unit conversion right on your wrist.
The new RPN Calc Watch app is fully native for iOS 9 and WatchOS2, and brings speedy, immediate performance, along with a new unit converter for convenient unit conversion right on your wrist.
8.1.3
May 12, 2015
RPN Calc now includes an Apple Watch App!
Remember those cool calculator watches from the 1980s? Unfortunately, none of them were RPN. RPN Calc brings a reverse polish notation watch calculator to the Apple Watch!
Remember those cool calculator watches from the 1980s? Unfortunately, none of them were RPN. RPN Calc brings a reverse polish notation watch calculator to the Apple Watch!
8.1.2
Apr 23, 2015
RPN Calc now includes an Apple Watch App!
Remember those cool calculator watches from the 1980s? Unfortunately, none of them were RPN. RPN Calc brings a reverse polish notation watch calculator to the Apple Watch!
Remember those cool calculator watches from the 1980s? Unfortunately, none of them were RPN. RPN Calc brings a reverse polish notation watch calculator to the Apple Watch!
8.1.1
Apr 15, 2015
RPN Calc now includes an Apple Watch App!
Remember those cool calculator watches from the 1980s? Unfortunately, none of them were RPN. RPN Calc brings a reverse polish notation watch calculator to the Apple Watch!
Remember those cool calculator watches from the 1980s? Unfortunately, none of them were RPN. RPN Calc brings a reverse polish notation watch calculator to the Apple Watch!
8.1
Apr 10, 2015
RPN Calc now includes an Apple Watch App!
Remember those cool calculator watches from the 1980s? Unfortunately, none of them were RPN. RPN Calc brings a reverse polish notation watch calculator to the Apple Watch!
Remember those cool calculator watches from the 1980s? Unfortunately, none of them were RPN. RPN Calc brings a reverse polish notation watch calculator to the Apple Watch!
8.0.1
Nov 9, 2014
- Fixed iPhone 6+ display bug.
RPN Calc FAQ
Click here to learn how to download RPN Calc in restricted country or region.
Check the following list to see the minimum requirements of RPN Calc.
iPhone
Requires iOS 16.0 or later.
iPad
Requires iPadOS 16.0 or later.
Apple Watch
Requires watchOS 10.0 or later.
RPN Calc supports English
