RPN-35 SD2.4 - App Store
You'll be able to see results in few seconds.
Publisher Description
On January 4, 1972, Hewlett-Packard announced the HP-35, world's first scientific calculator small enough to fit in a pocket - more precisely, Bill Hewlett's shirt-pocket. The HP-35 was an immediate hit with students, engineers, and scientists. Despite its steep price of $395 (about $3000 today), it sold ten times better than anticipated in the first year.
Experience this unique calculator that won HP the prestigious "IEEE Milestone in Electrical Engineering and Computing" in 2009.
Features:
. Photo-realistic look-and-feel
. Three skins: version 1, versions 2 & 3 (1973) and final version 4 (1974)
. Vintage mode and Enhanced mode
. Key-click and key-glow, both optional
. Swipe left across display to correct number input errors
. Cut/copy/paste display value
. Display stack registers and memory registers
. All decimal points but one light when iPhone battery charge drops below 5%
Vintage mode
In this mode, peculiarities of a real HP-35 are simulated:
- original speed of operation
- stack register Z copied to T on trig functions
- leading zeros may be entered; zero can be made negative
- a negative number may be entered by pressing CHS before or after the number
- a keyboard entry or RCL immediately following STO does not raise the stack
- for version 1 only: simulation of a number of known arithmetic bugs
Enhanced mode
- non-volatile stack and registers
- use registers 1 through 9 with HP-45-like register arithmetic
- register 0 works as LastX register
Version History • Improved compatibility with iPhone Air and iOS 26. 2.4 10/16/2025 • Faster startup – no delay until the first button press is recognized after switching on. 2.3 05/09/2025 • Redesigned Settings screen
• Visual adjustments to iPhone 16 Pro and iPhone 16 Pro Max
• RPN-35 SD requires iOS 12 or later 2.2 10/30/2024 • Haptics
– Set the haptic feedback level in the calculator's settings.
– „Sounds & Haptics“ / „System Haptics“ must be on in the iPhone's settings.
– Note that iPads have no haptics engine.
• Optimized Settings View for devices with Home button
• Compatibility with iPhone 14 Pro 2.1 09/22/2022 Compatibility with iPhone 12 2.0.2 11/05/2020 Fixed bug:
Calculations in scientific mode in regions not using "E" as exponent symbol (i.e. Sweden, Australia, Slovenia) would cause a crash. 2.0.1 03/18/2020 • If RPN-35 is set to HP-35 version v1 ("Red dot") and Vintage Mode is on:
1. Simulation of (rather weird) EEX key behavior, i.e. exponent not shown initially, CHS ignored after digit entry, no CHS toggling
2. Simulation of additional known calculation bugs. See website for details.
• HP-35 version 4 shows correct logo and label at the bottom (on applicable iOS devices.)
• Support for iOS 13 Dark Mode
RPN-35 SD now requires iOS 11 or later. 2.0 01/25/2020 Emulation of known calculation bugs found in early HP-35 models (only if RPN-35 is set to HP-35 version v1 and Vintage Mode is on.)
See website for details. 1.7 08/13/2019 • Changed "Undo digit" sound to same as found on other CuVee calculators
• Many under-the-hood refinements
• Support of late 2018 iPhones 1.6 01/07/2019 • Values containing blanks may be pasted into display 1.5.2 11/06/2017 • Improved compatibility with iPhone X
Bug fix:
• Incorrect app icon shown when installed on iPad 1.5.1 10/30/2017 • Improved trig functions for extremely small angles
• Support for iOS 11 and iPhone X 1.5 10/24/2017 • Fixed sin(90°) sign error 1.4.1 01/19/2017 This update requires iOS 8 or later.
• Improved results for SIN, COS, TAN with very large arguments
• Decimal addition/subtraction for higher precision
• Calculator sounds mix with background audio and have their own volume control 1.4 10/02/2016 • Fixes an issue where a result rounded up to 1, e.g. cos(0.0001), would be displayed as a decimal point only. 1.3.1 04/07/2016 • If audio is playing on start-up, RPN-35 SD will not produce any sounds 1.3 09/02/2015 • Added info about how to access settings screen
• Fixed non-volatile memory not working 1.2 05/12/2015 • HP-35 version 1 (with red dot) added
• For the purists: Settings and Info buttons may be set to invisible
• Low-battery situation shows one decimal point unlit, as depicted in the HP-35 User's Manual 1.1 04/08/2015 1.0 01/18/2015
About RPN-35 SD
The company that develops RPN-35 SD is Willy Kunz. The latest version released by its developer is 2.4.
To install RPN-35 SD 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 2026-10-15 and was downloaded 0 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-35 SD as malware if the download link is broken.
How to install RPN-35 SD 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-35 SD 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-35 SD 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 2.4
posted on 2026-10-15
Version History • Improved compatibility with iPhone Air and iOS 26. 2.4 10/16/2025 • Faster startup – no delay until the first button press is recognized after switching on. 2.3 05/09/2025 • Redesigned Settings screen
• Visual adjustments to iPhone 16 Pro and iPhone 16 Pro Max
• RPN-35 SD requires iOS 12 or later 2.2 10/30/2024 • Haptics
– Set the haptic feedback level in the calculator's settings.
– „Sounds & Haptics“ / „System Haptics“ must be on in the iPhone's settings.
– Note that iPads have no haptics engine.
• Optimized Settings View for devices with Home button
• Compatibility with iPhone 14 Pro 2.1 09/22/2022 Compatibility with iPhone 12 2.0.2 11/05/2020 Fixed bug:
Calculations in scientific mode in regions not using "E" as exponent symbol (i.e. Sweden, Australia, Slovenia) would cause a crash. 2.0.1 03/18/2020 • If RPN-35 is set to HP-35 version v1 ("Red dot") and Vintage Mode is on:
1. Simulation of (rather weird) EEX key behavior, i.e. exponent not shown initially, CHS ignored after digit entry, no CHS toggling
2. Simulation of additional known calculation bugs. See website for details.
• HP-35 version 4 shows correct logo and label at the bottom (on applicable iOS devices.)
• Support for iOS 13 Dark Mode
RPN-35 SD now requires iOS 11 or later. 2.0 01/25/2020 Emulation of known calculation bugs found in early HP-35 models (only if RPN-35 is set to HP-35 version v1 and Vintage Mode is on.)
See website for details. 1.7 08/13/2019 • Changed "Undo digit" sound to same as found on other CuVee calculators
• Many under-the-hood refinements
• Support of late 2018 iPhones 1.6 01/07/2019 • Values containing blanks may be pasted into display 1.5.2 11/06/2017 • Improved compatibility with iPhone X
Bug fix:
• Incorrect app icon shown when installed on iPad 1.5.1 10/30/2017 • Improved trig functions for extremely small angles
• Support for iOS 11 and iPhone X 1.5 10/24/2017 • Fixed sin(90°) sign error 1.4.1 01/19/2017 This update requires iOS 8 or later.
• Improved results for SIN, COS, TAN with very large arguments
• Decimal addition/subtraction for higher precision
• Calculator sounds mix with background audio and have their own volume control 1.4 10/02/2016 • Fixes an issue where a result rounded up to 1, e.g. cos(0.0001), would be displayed as a decimal point only. 1.3.1 04/07/2016 • If audio is playing on start-up, RPN-35 SD will not produce any sounds 1.3 09/02/2015 • Added info about how to access settings screen
• Fixed non-volatile memory not working 1.2 05/12/2015 • HP-35 version 1 (with red dot) added
• For the purists: Settings and Info buttons may be set to invisible
• Low-battery situation shows one decimal point unlit, as depicted in the HP-35 User's Manual 1.1 04/08/2015 1.0 01/18/2015
version 2.4
posted on 2025-10-16
• Improved compatibility with iPhone Air and iOS 26.
version 2.3
posted on 2025-05-09
May 9, 2025
Version 2.3
• Faster startup – no delay until the first button press is recognized after switching on.
version 2.2
posted on 2024-10-30
Oct 30, 2024
Version 2.2
• Redesigned Settings screen
• Visual adjustments to iPhone 16 Pro and iPhone 16 Pro Max
• RPN-35 SD requires iOS 12 or later
version 2.1
posted on 2022-09-22
Sep 22, 2022
Version 2.1
• Haptics
– Set the haptic feedback level in the calculator's settings.
– „Sounds & Haptics“ / „System Haptics“ must be on in the iPhone's settings.
– Note that iPads have no haptics engine.
• Optimized Settings View for devices with Home button
• Compatibility with iPhone 14 Pro
version 2.0.2
posted on 2020-11-05
Nov 5, 2020 Version 2.0.2
Compatibility with iPhone 12
version 2.0.1
posted on 2020-03-18
Mar 18, 2020 Version 2.0.1
Fixed bug:
Calculations in scientific mode in regions not using "E" as exponent symbol (i.e. Sweden, Australia, Slovenia) would cause a crash.
version 2.0
posted on 2020-01-25
Jan 25, 2020 Version 2.0
• If RPN-35 is set to HP-35 version v1 ("Red dot") and Vintage Mode is on:
1. Simulation of (rather weird) EEX key behavior, i.e. exponent not shown initially, CHS ignored after digit entry, no CHS toggling
2. Simulation of additional known calculation bugs. See website for details.
• HP-35 version 4 shows correct logo and label at the bottom (on applicable iOS devices.)
• Support for iOS 13 Dark Mode
RPN-35 SD now requires iOS 11 or later.
version 1.3.1
posted on 2015-01-18
version 2.0.1
posted on 1970-01-01
2020年3月18日 Version 2.0.1
Fixed bug:
Calculations in scientific mode in regions not using "E" as exponent symbol (i.e. Sweden, Australia, Slovenia) would cause a crash.
Disclaimer
Official App Store Link
We do not host RPN-35 SD on our servers. We did not scan it for viruses, adware, spyware or other type of malware. This app is hosted by Apple and passed their terms and conditions to be listed there. We recommend caution when installing it.
The App Store link for RPN-35 SD is provided to you by apps112.com without any warranties, representations or guarantees of any kind, so access it at your own risk.
If you have questions regarding this particular app contact the publisher directly. For questions about the functionalities of apps112.com contact us.
