About RPN-32 CE
RPN-32 CE is the first photo-realistic simulation of Hewlett-Packard's popular mid-range scientific calculator HP-32E for the iPhone. Produced from 1978 through 1983, it was the "Thyme" member of the third-generation HP...
RPN-32 CE is the first photo-realistic simulation of Hewlett-Packard's popular mid-range scientific calculator HP-32E for the iPhone. Produced from 1978 through 1983, it was the "Thyme" member of the third-generation HP calculators known as the "Spice" series. While the simulator works like the original calculator, a number of carefully designed extensions make it a lot easier to use. Unlike the HP-32E, this version is fully programmable, running virtually all programs written for the HP-25! Features: . Photo-realistic look-and-feel . Programmable (99 steps), subroutines, flags, loop control, branching . Insert and delete steps with automatic address correction . 20 registers, "continuous", with unrestricted store/recall arithmetic . Indirect register addressing . "Live" register view . Program listing view . Program library view . Store and retrieve any number of programs . Sharing: e-mail, AirDrop, Dropbox, copy, paste, print . 44 programs pre-installed . Import GO-25 programs . Export programs to RPN-25 CE Calculator functions: . Statistics (mean, standard deviation, linear regression, normal distribution) . Factorial . Trigonometric functions (degrees, radians, grads) . Polar/rectangular conversions . Hyperbolics . Inverse, square root, logarithm, exponential, pi . Storage arithmetic (store and recall) . Percent change . Percentage of Total . Unit and hours conversions . Many additional functions not found on the HP-32 Details: cuveesoft.ch/rpn32
Version History • Improved compatibility with iPhone Air and iOS 26. 4.3 10/15/2025 Non-volatile stack: when reloading the app, the stack is now restored along with all registers. 4.2 07/25/2025 • Faster startup – no delay until the first button press is recognized after switching on. 4.1 05/08/2025 • Added warning when attempting to replace a Sample Program. • Increased pause length to 2 seconds • Visual adjustments to iPhone 16 Pro and iPhone 16 Pro Max 4.0 10/22/2024 • Clarified program example on info screen by adding an instruction. • Internal optimizations and cleanups. • Modified info screen to avoid clipping by the Dynamic Island. 3.9 01/15/2024 • Runs on Apple Silicon Macs (see notes on homepage cuveesoft.ch) • RPN-32 CE requires iOS 12.0 or later 3.8 12/23/2023 • Haptics Set the haptic feedback level in the calculator's settings. „Sounds & Haptics“ / „System Haptics“ must be on in the iPhone's settings. • Program list view can be dragged down to dismiss it. 3.7 09/28/2022 • Change the program listing font with a simple tap on the new button "F" • Apply a filter to quickly find any program. • Sample Programs may be hidden in the list of programs. 3.6 04/09/2022 • New sample program "TVM - Time Value of Money" Run financial calculations involving payments, interest rate, present and future values, and periods or number of payments. 3.5 10/05/2021 • When executed interactively, ISG and DSE do not change the program counter Bug fixes: • Deleting a block of program steps could result in wrongly adjusted branch targets in some cases • ISG/DSE commands were susceptible to internal rounding effects • RCi did not lift the stack when executed by a program 3.4 12/15/2020 • Print (or mail as PDF) the program or its description • A program running longer than one minute will emit a short beep when executing the final GTO 00 command • Tap f or g, then P/R to see a 12- or 24-hour clock. • Improved accuracy in extreme cases of y^x with positive, integer x. For example, 1.0000001^(2^27) = 674530.4707, not 674530.4760 • Call up "What's New" anytime from Info screen • Compatibility with iPhone 12 Bug fixes: • Fixed display issues when using the iPhone in "Zoomed" mode • The RND function didn't work correctly in regions using a comma as decimal point • Double- or triple-tapping the empty program listing could cause a crash. • Setting the haptic feedback level didn't check sufficiently for the correct code 3.3 11/08/2020 • Some programs have been added or updated. Be sure to execute "Reload Sample Programs" to refresh the list. Bug fix: • Instructions involving register arithmetic with extended registers were not correctly encoded 3.2.1 09/24/2020 • NOP instructions targeted by GTO or GSB are automatically changed into LBL instructions • Operations and decimal point following STO or RCL may now be added or removed in any order • New instructions: exchange X directly or indirectly with any register, swap primary and secondary registers, and more (see website) • Improved import of HP-25 programs created by the GO-25 simulator. ("Share PRGM" to "Pasteboard" on GO-25, then long-press display of RPN-32 CE in program mode and paste.) • Haptic feedback may be turned off and on: – Store 1939010X in R0 to set amount of feedback (where X = 0: no feedback, X = 3: maximum feedback) (Hewlett-Packard Company was founded on Jan 1, 1939) Bug fixes: • Deleting a range of steps (DLx,y) did not correctly adjust targets of GTO and GSB in all cases • Wrong translation of instruction RND imported from GO-25 • Angular mode didn't get exported when sharing in calculator view 3.2 09/02/2020 • Register view shows localized formatted value while number is being entered Bug fix: • Using scientific notation could crash the app in some regions, i.e. Australia, Sweden, Slovenia. 3.1 03/20/2020 • Support for iOS 13: Dark Mode, file sharing • Email programs directly from the program list • Replacing registers by pasting a program into the display is now optional • Many under-the-hood optimizations Check out the new Download walk-through on the website (under "Sharing".) Bug fixes: • The keys GTO, STO, and RCL didn't cancel a pending flag command • Executing the summation command ∑ with a very large argument would cause a crash RPN-32 CE now requires iOS 11 or later. 3.0 01/25/2020 New features: • New editing commands in programming mode: – DELx,y: delete range of program steps – DELEnd: delete steps from current position to end of program Bug fix: • The instruction GSB 90 could not be entered 2.8 08/12/2019 New features: • Long-press program listing to change font of description from proportional to non-proportional and vice versa. • New program "Curve Fitting" added 2.7 07/02/2019 Fixed crash on double-tapping GTO nn in program listing when step nn didn't exist 2.6 05/28/2019 • Register R.9 is now formatted in Register View for easy interpreting in ISG/DSE commands Bug fix: • Commands STi and RCi were not correctly assigned to key codes 2.5 04/06/2019 • Optional stack display (swipe display right/left) • Indirect addressing of all 20 registers via the R.9 register (on f and g keys) • Set flags are shown as highlighted register number in Register View • Flags are now saved and loaded along with programs • Warning on deleting program memory or program files • On-screen error descriptions • Improved reliability of comparisons • New programs: Gamma Function (Spouge), Incomplete Gamma 2.4 02/05/2019 • New sample programs: – "Solve for f(x)=0 Newton" – "Simult. Equations in 3 Unknowns" – "LogFactorial" • Improved programs: – "Simult. Equations in 2 Unknowns" – "Fibonacci Numbers" • Improved Program Listing (tap "?" in listing screen) • New buttons at top to select TOP, MID or END of program • Built-in descriptions of top functions (see Settings) • Except on step 00, pressing R/S shows next command to be executed; releasing R/S starts executing • Renamed button "Load" to "Save" • Changed "Undo digit" sound to same as with other CuVee calculators • Support for late 2018 iPhones Bug fixes: • Improved reliability of DSE and ISG commands • Digit separators were not cleared when starting number entry with EEX 2.3 01/09/2019 • Improved compatibility with iPhone X Bug fixes: • Incorrect app icon shown when installed on iPad • Number format issues and possible crash when using the EEX key 2.2.1 11/06/2017 New sample program added: • Progressions (arithmetic, geometric, harmonic) • Improved trig functions for extremely small angles • Support for iOS 11 Bug fixes: • Separators didn't always disappear when changing display mode to SCI or ENG • Copied display values with exponent could be improperly formatted 2.2 10/24/2017 New sample programs added: • First Order Differential Equations • GCD and LCM (Greatest Common Divisor and Least Common Multiple) • Rectangular / Hyperbolic Polar Coordinates Conversion • Rectangular / Spherical Coordinates Conversion • Sum of Digits Game 2.1 09/06/2017 • New program "Numerical Integration" (tap "Reload Sample Programs" to see it) Bug fixes: • RND didn't work correctly on certain values • Deleting steps caused wrong address corrections in some cases 2.0.1 05/23/2017
Previous Versions
Here you can find the changelog of RPN-32 CE since it was posted on our website on 2016-09-28 15:39:34.
The latest version is 4.3 and it was updated on 2026-06-23 16:33:44. See below the changes in each version.
RPN-32 CE version 4.3
Updated At: 2026-06-02
Changes: Version History • Improved compatibility with iPhone Air and iOS 26. 4.3 10/15/2025 Non-volatile stack: when reloading the app, the stack is now restored along with all registers. 4.2 07/25/2025 • Faster startup – no delay until the first button press is recognized after switching on. 4.1 05/08/2025 • Added warning when attempting to replace a Sample Program.
• Increased pause length to 2 seconds
• Visual adjustments to iPhone 16 Pro and iPhone 16 Pro Max 4.0 10/22/2024 • Clarified program example on info screen by adding an instruction.
• Internal optimizations and cleanups.
• Modified info screen to avoid clipping by the Dynamic Island. 3.9 01/15/2024 • Runs on Apple Silicon Macs (see notes on homepage cuveesoft.ch)
• RPN-32 CE requires iOS 12.0 or later 3.8 12/23/2023 • Haptics
Set the haptic feedback level in the calculator's settings.
„Sounds & Haptics“ / „System Haptics“ must be on in the iPhone's settings.
• Program list view can be dragged down to dismiss it. 3.7 09/28/2022 • Change the program listing font with a simple tap on the new button "F"
• Apply a filter to quickly find any program.
• Sample Programs may be hidden in the list of programs. 3.6 04/09/2022 • New sample program "TVM - Time Value of Money"
Run financial calculations involving payments, interest rate, present and future values, and periods or number of payments. 3.5 10/05/2021 • When executed interactively, ISG and DSE do not change the program counter
Bug fixes:
• Deleting a block of program steps could result in wrongly adjusted branch targets in some cases
• ISG/DSE commands were susceptible to internal rounding effects
• RCi did not lift the stack when executed by a program 3.4 12/15/2020 • Print (or mail as PDF) the program or its description
• A program running longer than one minute will emit a short beep when executing the final GTO 00 command
• Tap f or g, then P/R to see a 12- or 24-hour clock.
• Improved accuracy in extreme cases of y^x with positive, integer x.
For example, 1.0000001^(2^27) = 674530.4707, not 674530.4760
• Call up "What's New" anytime from Info screen
• Compatibility with iPhone 12
Bug fixes:
• Fixed display issues when using the iPhone in "Zoomed" mode
• The RND function didn't work correctly in regions using a comma as decimal point
• Double- or triple-tapping the empty program listing could cause a crash.
• Setting the haptic feedback level didn't check sufficiently for the correct code 3.3 11/08/2020 • Some programs have been added or updated. Be sure to execute "Reload Sample Programs" to refresh the list.
Bug fix:
• Instructions involving register arithmetic with extended registers were not correctly encoded 3.2.1 09/24/2020 • NOP instructions targeted by GTO or GSB are automatically changed into LBL instructions
• Operations and decimal point following STO or RCL may now be added or removed in any order
• New instructions: exchange X directly or indirectly with any register, swap primary and secondary registers, and more (see website)
• Improved import of HP-25 programs created by the GO-25 simulator.
("Share PRGM" to "Pasteboard" on GO-25, then long-press display of RPN-32 CE in program mode and paste.)
• Haptic feedback may be turned off and on:
– Store 1939010X in R0 to set amount of feedback
(where X = 0: no feedback, X = 3: maximum feedback)
(Hewlett-Packard Company was founded on Jan 1, 1939)
Bug fixes:
• Deleting a range of steps (DLx,y) did not correctly adjust targets of GTO and GSB in all cases
• Wrong translation of instruction RND imported from GO-25
• Angular mode didn't get exported when sharing in calculator view 3.2 09/02/2020 • Register view shows localized formatted value while number is being entered
Bug fix:
• Using scientific notation could crash the app in some regions, i.e. Australia, Sweden, Slovenia. 3.1 03/20/2020 • Support for iOS 13: Dark Mode, file sharing
• Email programs directly from the program list
• Replacing registers by pasting a program into the display is now optional
• Many under-the-hood optimizations
Check out the new Download walk-through on the website (under "Sharing".)
Bug fixes:
• The keys GTO, STO, and RCL didn't cancel a pending flag command
• Executing the summation command ∑ with a very large argument would cause a crash
RPN-32 CE now requires iOS 11 or later. 3.0 01/25/2020 New features:
• New editing commands in programming mode:
– DELx,y: delete range of program steps
– DELEnd: delete steps from current position to end of program
Bug fix:
• The instruction GSB 90 could not be entered 2.8 08/12/2019 New features:
• Long-press program listing to change font of description from proportional to non-proportional and vice versa.
• New program "Curve Fitting" added 2.7 07/02/2019 Fixed crash on double-tapping GTO nn in program listing when step nn didn't exist 2.6 05/28/2019 • Register R.9 is now formatted in Register View for easy interpreting in ISG/DSE commands
Bug fix:
• Commands STi and RCi were not correctly assigned to key codes 2.5 04/06/2019 • Optional stack display (swipe display right/left)
• Indirect addressing of all 20 registers via the R.9 register (on f and g keys)
• Set flags are shown as highlighted register number in Register View
• Flags are now saved and loaded along with programs
• Warning on deleting program memory or program files
• On-screen error descriptions
• Improved reliability of comparisons
• New programs: Gamma Function (Spouge), Incomplete Gamma 2.4 02/05/2019 • New sample programs:
– "Solve for f(x)=0 Newton"
– "Simult. Equations in 3 Unknowns"
– "LogFactorial"
• Improved programs:
– "Simult. Equations in 2 Unknowns"
– "Fibonacci Numbers"
• Improved Program Listing (tap "?" in listing screen)
• New buttons at top to select TOP, MID or END of program
• Built-in descriptions of top functions (see Settings)
• Except on step 00, pressing R/S shows next command to be executed; releasing R/S starts executing
• Renamed button "Load" to "Save"
• Changed "Undo digit" sound to same as with other CuVee calculators
• Support for late 2018 iPhones
Bug fixes:
• Improved reliability of DSE and ISG commands
• Digit separators were not cleared when starting number entry with EEX 2.3 01/09/2019 • Improved compatibility with iPhone X
Bug fixes:
• Incorrect app icon shown when installed on iPad
• Number format issues and possible crash when using the EEX key 2.2.1 11/06/2017 New sample program added:
• Progressions (arithmetic, geometric, harmonic)
• Improved trig functions for extremely small angles
• Support for iOS 11
Bug fixes:
• Separators didn't always disappear when changing display mode to SCI or ENG
• Copied display values with exponent could be improperly formatted 2.2 10/24/2017 New sample programs added:
• First Order Differential Equations
• GCD and LCM (Greatest Common Divisor and Least Common Multiple)
• Rectangular / Hyperbolic Polar Coordinates Conversion
• Rectangular / Spherical Coordinates Conversion
• Sum of Digits Game 2.1 09/06/2017 • New program "Numerical Integration" (tap "Reload Sample Programs" to see it)
Bug fixes:
• RND didn't work correctly on certain values
• Deleting steps caused wrong address corrections in some cases 2.0.1 05/23/2017
RPN-32 CE version 4.3
Updated At: 2025-10-15
Changes: • Improved compatibility with iPhone Air and iOS 26.
RPN-32 CE version 4.2
Updated At: 2025-07-25
Changes: Jul 25, 2025
Version 4.2
Non-volatile stack: when reloading the app, the stack is now restored along with all registers.
RPN-32 CE version 4.1
Updated At: 2025-05-08
Changes: May 8, 2025
Version 4.1
• Faster startup – no delay until the first button press is recognized after switching on.
RPN-32 CE version 4.0
Updated At: 2024-10-22
Changes: Oct 22, 2024
Version 4.0
• Added warning when attempting to replace a Sample Program.
• Increased pause length to 2 seconds
• Visual adjustments to iPhone 16 Pro and iPhone 16 Pro Max
RPN-32 CE version 3.9
Updated At: 2024-01-15
Changes: Jan 15, 2024
Version 3.9
• Clarified program example on info screen by adding an instruction.
• Internal optimizations and cleanups.
• Modified info screen to avoid clipping by the Dynamic Island.
RPN-32 CE version 3.8
Updated At: 2023-12-23
Changes: Dec 23, 2023
Version 3.8
• Runs on Apple Silicon Macs (see notes on homepage cuveesoft.ch)
• RPN-32 CE requires iOS 12.0 or later
RPN-32 CE version 3.7
Updated At: 2022-09-28
Changes: Sep 28, 2022
Version 3.7
• Haptics
Set the haptic feedback level in the calculator's settings.
„Sounds & Haptics“ / „System Haptics“ must be on in the iPhone's settings.
• Program list view can be dragged down to dismiss it.
RPN-32 CE version 3.6
Updated At: 2022-04-09
Changes: Apr 9, 2022 Version 3.6
• Change the program listing font with a simple tap on the new button "F"
• Apply a filter to quickly find any program.
• Sample Programs may be hidden in the list of programs.
RPN-32 CE version 3.5
Updated At: 2021-10-05
Changes: Oct 5, 2021 Version 3.5
• New sample program "TVM - Time Value of Money"
Run financial calculations involving payments, interest rate, present and future values, and periods or number of payments.
Disclaimer
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