RPN Calc13.1.0
Publisher Description
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.
Version History - An updated Watch interface with a new math function screen accessed by up / down swipes or by using the Digital Crown. 13.1.0 Aug 13 Updated for iOS 26, iPadOS 26, watchOS 26, and visionOS 26! 13.0.7 10/01/2025 Updated for iOS 26, iPadOS 26, watchOS 26, and visionOS 26! 13.0.6 09/23/2025 - Updated for iOS 18, iPadOS 18, WatchOS 11, and VisionOS 2!
- Interface refreshed and updated with a clean, modern design! 13.0.5 12/18/2024 - Updated for iOS 18, iPadOS 18, WatchOS 11, and VisionOS 2!
- Interface refreshed and updated with a clean, modern design! 13.0.4 09/20/2024 - Interface refreshed and updated with a clean, modern design! 13.0.3 05/21/2024 - Interface refreshed and updated with a clean, modern design! 13.0.2 04/18/2024 - Interface refreshed and updated with a clean, modern design! 13.0.1 04/16/2024 - Interface refreshed and updated with a clean, modern design! 13.0.0 01/25/2024 - Update for Apple Watch Ultra 12.0.8 07/26/2023 - Minor bug fix. 12.0.7 01/14/2022 Updated for the new Series 7 Apple Watches! 12.0.6 10/14/2021 Updated for the new Series 7 Apple Watches! 12.0.5 10/13/2021 Minor bug fixes 12.0.4 06/03/2021 Minor bug fixes. 12.0.3 05/25/2021 Minor bug fixes 12.0.2 04/06/2021 Watch App display settings can now be set from the new display menu! 12.0.1 01/20/2021 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. 12.0.0 10/17/2019 Updated for the new iPhone Xs, Xs Max, and Xr along with the new iPad Pros! 11.0.0 12/10/2018 - Bug fix 10.0.4 08/13/2018 - Updated for iOS 11 and the new iPhones! 10.0.3 11/28/2017 - Updated for iOS 11 and the new iPhones! 10.0.2 11/13/2017 - Updated for iOS 11 and the new iPhones! 10.0.1 11/02/2017 - Updated for iOS 11 and the new iPhones! 10.0.0 10/30/2017 - New quick launch complication for Watch app!
- Minor bug fixes. 9.0.3 09/19/2016
About RPN Calc
The company that develops RPN Calc is James Mattis. The latest version released by its developer is 13.1.0. This app was rated by 1 users of our site and has an average rating of 2.0.
To install RPN Calc on your iOS device, just click the green Continue To App button above to start the installation process. The app is listed on our website since 2026-10-13 and was downloaded 32 times. We have already checked if the download link is safe, however for your own protection we recommend that you scan the downloaded app with your antivirus. Your antivirus may detect the RPN Calc as malware if the download link is broken.
How to install RPN Calc on your iOS device:
- Click on the Continue To App button on our website. This will redirect you to the App Store.
- Once the RPN Calc is shown in the iTunes listing of your iOS device, you can start its download and installation. Tap on the GET button to the right of the app to start downloading it.
- If you are not logged-in the iOS appstore app, you'll be prompted for your your Apple ID and/or password.
- After RPN Calc is downloaded, you'll see an INSTALL button to the right. Tap on it to start the actual installation of the iOS app.
- Once installation is finished you can tap on the OPEN button to start it. Its icon will also be added to your device home screen.
Program Details
System requirements
Download information
Pricing
Version History
version 13.1.0
posted on 2026-10-13
Version History - An updated Watch interface with a new math function screen accessed by up / down swipes or by using the Digital Crown. 13.1.0 Aug 13 Updated for iOS 26, iPadOS 26, watchOS 26, and visionOS 26! 13.0.7 10/01/2025 Updated for iOS 26, iPadOS 26, watchOS 26, and visionOS 26! 13.0.6 09/23/2025 - Updated for iOS 18, iPadOS 18, WatchOS 11, and VisionOS 2!
- Interface refreshed and updated with a clean, modern design! 13.0.5 12/18/2024 - Updated for iOS 18, iPadOS 18, WatchOS 11, and VisionOS 2!
- Interface refreshed and updated with a clean, modern design! 13.0.4 09/20/2024 - Interface refreshed and updated with a clean, modern design! 13.0.3 05/21/2024 - Interface refreshed and updated with a clean, modern design! 13.0.2 04/18/2024 - Interface refreshed and updated with a clean, modern design! 13.0.1 04/16/2024 - Interface refreshed and updated with a clean, modern design! 13.0.0 01/25/2024 - Update for Apple Watch Ultra 12.0.8 07/26/2023 - Minor bug fix. 12.0.7 01/14/2022 Updated for the new Series 7 Apple Watches! 12.0.6 10/14/2021 Updated for the new Series 7 Apple Watches! 12.0.5 10/13/2021 Minor bug fixes 12.0.4 06/03/2021 Minor bug fixes. 12.0.3 05/25/2021 Minor bug fixes 12.0.2 04/06/2021 Watch App display settings can now be set from the new display menu! 12.0.1 01/20/2021 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. 12.0.0 10/17/2019 Updated for the new iPhone Xs, Xs Max, and Xr along with the new iPad Pros! 11.0.0 12/10/2018 - Bug fix 10.0.4 08/13/2018 - Updated for iOS 11 and the new iPhones! 10.0.3 11/28/2017 - Updated for iOS 11 and the new iPhones! 10.0.2 11/13/2017 - Updated for iOS 11 and the new iPhones! 10.0.1 11/02/2017 - Updated for iOS 11 and the new iPhones! 10.0.0 10/30/2017 - New quick launch complication for Watch app!
- Minor bug fixes. 9.0.3 09/19/2016
version 13.1.0
posted on 2026-09-04
Version History - An updated Watch interface with a new math function screen accessed by up / down swipes or by using the Digital Crown. 13.1.0 Aug 13 Updated for iOS 26, iPadOS 26, watchOS 26, and visionOS 26! 13.0.7 10/01/2025 Updated for iOS 26, iPadOS 26, watchOS 26, and visionOS 26! 13.0.6 09/23/2025 - Updated for iOS 18, iPadOS 18, WatchOS 11, and VisionOS 2!
- Interface refreshed and updated with a clean, modern design! 13.0.5 12/18/2024 - Updated for iOS 18, iPadOS 18, WatchOS 11, and VisionOS 2!
- Interface refreshed and updated with a clean, modern design! 13.0.4 09/20/2024 - Interface refreshed and updated with a clean, modern design! 13.0.3 05/21/2024 - Interface refreshed and updated with a clean, modern design! 13.0.2 04/18/2024 - Interface refreshed and updated with a clean, modern design! 13.0.1 04/16/2024 - Interface refreshed and updated with a clean, modern design! 13.0.0 01/25/2024 - Update for Apple Watch Ultra 12.0.8 07/26/2023 - Minor bug fix. 12.0.7 01/14/2022 This app has been updated by Apple to prepare for watchOS 27 compatibility. No new features are included.
Updated for the new Series 7 Apple Watches! 12.0.6 10/14/2021 Updated for the new Series 7 Apple Watches! 12.0.5 10/13/2021 Minor bug fixes 12.0.4 06/03/2021 Minor bug fixes. 12.0.3 05/25/2021 Minor bug fixes 12.0.2 04/06/2021 Watch App display settings can now be set from the new display menu! 12.0.1 01/20/2021 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. 12.0.0 10/17/2019 Updated for the new iPhone Xs, Xs Max, and Xr along with the new iPad Pros! 11.0.0 12/10/2018 - Bug fix 10.0.4 08/13/2018 - Updated for iOS 11 and the new iPhones! 10.0.3 11/28/2017 - Updated for iOS 11 and the new iPhones! 10.0.2 11/13/2017 - Updated for iOS 11 and the new iPhones! 10.0.1 11/02/2017 - Updated for iOS 11 and the new iPhones! 10.0.0 10/30/2017 - New quick launch complication for Watch app!
- Minor bug fixes. 9.0.3 09/19/2016
version 13.1.0
posted on 2026-08-22
Version History - An updated Watch interface with a new math function screen accessed by up / down swipes or by using the Digital Crown. 13.1.0 Aug 13 Updated for iOS 26, iPadOS 26, watchOS 26, and visionOS 26! 13.0.7 10/01/2025 Updated for iOS 26, iPadOS 26, watchOS 26, and visionOS 26! 13.0.6 09/23/2025 - Updated for iOS 18, iPadOS 18, WatchOS 11, and VisionOS 2!
- Interface refreshed and updated with a clean, modern design! 13.0.5 12/18/2024 - Updated for iOS 18, iPadOS 18, WatchOS 11, and VisionOS 2!
- Interface refreshed and updated with a clean, modern design! 13.0.4 09/20/2024 - Interface refreshed and updated with a clean, modern design! 13.0.3 05/21/2024 - Interface refreshed and updated with a clean, modern design! 13.0.2 04/18/2024 - Interface refreshed and updated with a clean, modern design! 13.0.1 04/16/2024 - Interface refreshed and updated with a clean, modern design! 13.0.0 01/25/2024 - Update for Apple Watch Ultra 12.0.8 07/26/2023 - Minor bug fix. 12.0.7 01/14/2022 This update from Apple will improve the functionality of this app. No new features are included.
Updated for the new Series 7 Apple Watches! 12.0.6 10/14/2021 Updated for the new Series 7 Apple Watches! 12.0.5 10/13/2021 Minor bug fixes 12.0.4 06/03/2021 Minor bug fixes. 12.0.3 05/25/2021 Minor bug fixes 12.0.2 04/06/2021 Watch App display settings can now be set from the new display menu! 12.0.1 01/20/2021 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. 12.0.0 10/17/2019 Updated for the new iPhone Xs, Xs Max, and Xr along with the new iPad Pros! 11.0.0 12/10/2018 - Bug fix 10.0.4 08/13/2018 - Updated for iOS 11 and the new iPhones! 10.0.3 11/28/2017 - Updated for iOS 11 and the new iPhones! 10.0.2 11/13/2017 - Updated for iOS 11 and the new iPhones! 10.0.1 11/02/2017 - Updated for iOS 11 and the new iPhones! 10.0.0 10/30/2017 - New quick launch complication for Watch app!
- Minor bug fixes. 9.0.3 09/19/2016
version 13.0.7
posted on 2026-07-26
Version History Updated for iOS 26, iPadOS 26, watchOS 26, and visionOS 26! 13.0.7 10/01/2025 Updated for iOS 26, iPadOS 26, watchOS 26, and visionOS 26! 13.0.6 09/23/2025 - Updated for iOS 18, iPadOS 18, WatchOS 11, and VisionOS 2!
- Interface refreshed and updated with a clean, modern design! 13.0.5 12/18/2024 - Updated for iOS 18, iPadOS 18, WatchOS 11, and VisionOS 2!
- Interface refreshed and updated with a clean, modern design! 13.0.4 09/20/2024 - Interface refreshed and updated with a clean, modern design! 13.0.3 05/21/2024 - Interface refreshed and updated with a clean, modern design! 13.0.2 04/18/2024 - Interface refreshed and updated with a clean, modern design! 13.0.1 04/16/2024 - Interface refreshed and updated with a clean, modern design! 13.0.0 01/25/2024 - Update for Apple Watch Ultra 12.0.8 07/26/2023 - Minor bug fix. 12.0.7 01/14/2022 This update from Apple will improve the functionality of this app. No new features are included.
Updated for the new Series 7 Apple Watches! 12.0.6 10/14/2021 Updated for the new Series 7 Apple Watches! 12.0.5 10/13/2021 Minor bug fixes 12.0.4 06/03/2021 Minor bug fixes. 12.0.3 05/25/2021 Minor bug fixes 12.0.2 04/06/2021 Watch App display settings can now be set from the new display menu! 12.0.1 01/20/2021 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. 12.0.0 10/17/2019 Updated for the new iPhone Xs, Xs Max, and Xr along with the new iPad Pros! 11.0.0 12/10/2018 - Bug fix 10.0.4 08/13/2018 - Updated for iOS 11 and the new iPhones! 10.0.3 11/28/2017 - Updated for iOS 11 and the new iPhones! 10.0.2 11/13/2017 - Updated for iOS 11 and the new iPhones! 10.0.1 11/02/2017 - Updated for iOS 11 and the new iPhones! 10.0.0 10/30/2017 - New quick launch complication for Watch app!
- Minor bug fixes. 9.0.3 09/19/2016 - New quick launch complication for Watch app!
- Minor bug fixes. 9.0.2 08/01/2016
version 13.0.7
posted on 2025-10-01
Updated for iOS 26, iPadOS 26, watchOS 26, and visionOS 26!
version 13.0.6
posted on 2025-09-23
Sep 23, 2025
Version 13.0.6
Updated for iOS 26, iPadOS 26, watchOS 26, and visionOS 26!
version 13.0.5
posted on 2024-12-18
Dec 18, 2024
Version 13.0.5
- Updated for iOS 18, iPadOS 18, WatchOS 11, and VisionOS 2!
- Interface refreshed and updated with a clean, modern design!
version 13.0.4
posted on 2024-09-20
Sep 20, 2024
Version 13.0.4
- Updated for iOS 18, iPadOS 18, WatchOS 11, and VisionOS 2!
- Interface refreshed and updated with a clean, modern design!
version 13.0.3
posted on 2024-05-21
May 21, 2024
Version 13.0.3
- Interface refreshed and updated with a clean, modern design!
version 13.0.2
posted on 2024-04-18
Apr 18, 2024
Version 13.0.2
- Interface refreshed and updated with a clean, modern design!
