RPN-67 Pro 7.5 - App Store

RPN-67 Pro version 7.5

Updated At: 2026-06-11

Changes: Version History • In the Card Manager ("Cards"), the green label fields of user cards may be edited in W/PRGM mode, with "Show Card Content" set to off. • Improved support of Silicon Macs. 7.5 Apr 9 • In the Card Manager ("Cards"), quickly scroll to the program code for any user key. For HP program cards, tap the desired label letter A..E for LBL A..LBL E. Long-press for LBL a..LBL e. For user program cards, simply tap the desired green label field. • Visual optimizations for iOS 26. 7.4 Mar 3 • Faster startup – no delay until the first button press is recognized after switching on. 7.3 05/11/2025 • In "Max" mode, results such as 9.99×10⁹⁹ now appear correctly rounded both in the display and on the printer for all decimal point settings, e.g. SCI DSP 1 (in contrast to the original HP-67). • Certain calculations, e.g. 100⁷⁵, caused the app to crash. • Fixed the info screen on the main view not showing up correctly. 7.2 03/09/2025 • In "Cards": Easier navigation to first, current, or last program step (tap "?" for details). • Fixed: The Info screen on the main view didn't show up correctly. 7.1 11/04/2024 • In interactive mode, the g-shifted functions in the top row (DAT+, DDYS, ...) automatically switch to the appropriate display format for the duration of the selected pause length. • Thousand separators are now supported in "High-Contrast Display Digits" mode. • In addition to using the Settings, you can toggle "High-Contrast Display Digits" by tapping the key f, then double-tapping the display. • Likewise, thousand separators may be toggled by tapping f, then triple-tapping the display. • Swiping the card slot left opens the Card Manager. • The default angular mode indicator DEG goes out after the selected pause length. • Updated math functions supporting the OP SOLAR command. 7.0 07/07/2024 • If "Enhancements" are set to "Off", loading a blank card will display "Error" without altering the program memory, like on a real HP-67. • Listing font changed from Courier to Menlo for better legibility. • Improved reliability of Location Services. If the iPad doesn't support GPS, turn off "Precise Location" in Settings/Privacy & Security/Location Services/RPN-67 Pro for best results. • Updated Extra Functions 22 and -22 ("Print Device Name" and "Print System Version") to reflect new naming conventions. 6.9 02/16/2024 • Infinity indicators are not shown if Enhancements are "Off". • Improved search function in Card Manager. • Fixed a crash on trying to load a card with register data protected by Touch ID or Face ID. • RPN-67 Pro runs on Apple Silicon Macs (see notes on homepage cuveesoft.ch). • RPN-67 Pro requires iOS 12 or later. 6.8 12/24/2023 • Enable or disable the flashing of pressed keys in the Settings ("Flash Keys"). • In enhanced modes (Enhancements "Med" or "Max"), the trigonometric mode indicator DEG appears only when "Large Display Digits" is on. No indicators are shown in vintage mode (Enhancements "Off"). • New Extra Functions: - "Save Warnings on" (#14) enables warnings of unsaved card changes - "Save Warnings off" (#-14) disables warnings of unsaved card changes - "CPLX Mode on" (#15) turns complex mode on - "CPLX Mode off" (#-15) turns complex mode off • Long-press the circled info button to call up the "What's New" screen. 6.7 05/14/2023 • Toggle CPLX Mode using the new Extra Function 16 Fixed: In W/PRGM mode, program changes didn't enable the "Write Card" button in the Card Manager. 6.6 11/11/2022 • Added external keyboard command cmd-T to edit program title in Card Manager. • Improved handling of program cards saved with registers: - In Card Manager, the switch "With Regs" is set if the program card contains registers. - If the calculator has different register values, you may modify the card by tapping "Write Card". - If all calculator register values are 0, tapping "Write Card" removes all registers from the program card. Bug fix: • When using an external keyboard, some keys were unresponsive in iOS 15. 6.5 10/03/2022 Bug fixes: • In W/PRGM mode, suppress illegal commands GTO ∑+ and GSB ∑+. • With registers shown in landscape mode, rotating the iPad to portrait mode, then ending and restarting the app would display part of the register view behind the calculator. 6.4.2 02/18/2022 • iPad mini (2021) compatibility Bug fixes: • Extended Operation "DSP MODE" did not work as expected for thousands separators in some regions. • Changing decimal points using "DSP n" did not print the result in TRACE mode. • Suppressed illegal arguments of x≷ commands, e.g. x≷DSP. • Fixed erroneous step 194 in HP Standard Pac, "SD-05 Annuities and Compound Amounts". 6.4.1 10/04/2021 • Improved accuracy in extreme cases of y^x with positive, integer x. For example, 1.0000001^(2^27) = 674530.4707, not 674530.4760 Bug fixes: • ENTER in complex mode didn't work correctly • Division by 0 doesn't drop the stack anymore • Fixed issues when importing stack arithmetic commands from RPN-97 Pro • The RND function didn't work correctly in regions using a comma as decimal point 6.4 11/04/2020 Bug fixes: • Listing in Card Manager did not accept inserting a new step at the end • Certain instructions involving the (i) register did not translate correctly between RPN-67 and RPN-97 6.3.2 09/14/2020 Bug fix: • Instructions involving indirect addressing of extended register, like STO+.(i), are now correctly exported 6.3.1 09/08/2020 • In addition to title and description, a card search can now also be based on the instructions field • New Extra Function "Print Line Pattern" (#26) lets you print any of the line patterns offered by the TXT popup under program control • RPN-97's extended print commands (LINE, LABELS, EXT REGS, BATTERY LEVEL) and register arithmetic commands involving the I-register can now be imported and executed on RPN-67. • New external keyboard commands: - > : P≷S - shift-cmd-S: thousand's separators on/off - control-rightArrow: skip to next label - control-leftArrow: skip to previous label - shift-control-option-N: turn on the calculator, eject any card, set W/PRGM mode and clear the program memory • Extended support for external keyboard in Card Manager: – option-cmd-upArrow: address top card – option-cmd-downArrow: toggle between program and data cards – cmd-upArrow: address previous card – cmd-downArrow: address next card – cmd-leftArrow: address previous category – cmd-rightArrow: address next category - cmd-return: select currently addressed card - cmd-F: enter search mode - cmd-return: exit search mode with currently addressed card Download the complete list from the cuveesoft.ch homepage. Quickly find any card containing any text in the title, the description or the instructions, without ever touching the iPad's screen! • The current program step is always displayed in the listing, even when it is located in unused program memory. • Updated fundamental physical constants to recommended CODATA 2018 values (previously 2014) Bug fixes: • The Gamma function didn't return exactly 1 for the argument 1. • Calling up the OP or CC function from an external keyboard would stop the keyboard from responding for some functions until a calculator key was pressed on the iPad. • Starting up RPN-67 Pro in portrait mode could show the instructions in the wrong place when changing to landscape mode. 6.3 07/07/2020 • Simplified installation of user background image via Files app (see website, "Settings") • The operation "Print DOW" replaces "Sunday" with "Easter" if the date is Easter Day • Key flashing may be turned off and on: - Store 19390101 in R1 to turn off - Recall 19390101 from R1 to turn on (Hewlett-Packard Company was founded on Jan 1, 1939) • Additional commands for external keyboard: – shift-K: stack display - shift-$: ∑- – option-P: π Download the complete list from the cuveesoft.ch homepage. Bug fix: • Labels of a user program card were not editable 6.2 04/08/2020 • Hardware keyboard support! Use your iPad's Smart Keyboard, or any Bluetooth keyboard, to do calculations, run programs, change views, adjust settings, control the printer, and more – without ever touching the iPad screen. Press and hold the cmd-key to see the most important commands. Type cmd-? to see which key does what. • Portrait mode is back again! 6.1 03/17/2020 Bug fix: • Using scientific notation could crash the app in some regions, i.e. Australia, Sweden, Slovenia. 6.0.1 02/20/2020 • New Extra Function added: MAT MOD (#40) allows registers R1 to R9 (often used for matrix calculations) to be operated on simultaneously. A number of operations are available. See website (under "Extensions") for details. • Supports Slide Over on iPadOS. For example, you can store program snippets in a Notes file, then simply drag them into the listing in Card Manager. Or even into the calculator display. • Dark Mode compatibility • The rarely used portrait mode has been dropped Check out the new Download walk-through on the website (under "Sharing".) Bug fix: • Executing the summation command ∑ with a very large argument would cause a crash RPN-67 Pro now requires iOS 11 or later. 6.0 01/24/2020 • Greater functionality of the operation CPLX? (#01 - complex mode), now named CPX MODE (see website) • Delete a range of program steps by entering the range on the stack (X,Y), then pressing h DEL in RUN mode • To clear all breakpoints: set x = -1, then press STO BP. No dummy argument needed anymore. (Never used breakpoints? Try them, they're great! Tap RCL Info button for details.) Bug fixes: • Pressing a user-defined key, say A, when the current instruction was LBL A - and with the program containing additional LBL A instructions - would execute the next LBL A instead of the current one. • A multi-digit number beginning two steps after a skip decision would not be compressed into a single step by NUM CPRS. • Rounding (RND) would sometimes not use the DSP setting when called from a program. • The operation "Print Inline Text 2" reverted to "Print Inline Text 1" after printing. • Corrected errors in "03 - Curve Fitting" of the HP Standard Pac. Download card from the website, Library 1, if needed. • GTO BP + ("go to next breakpoint") was ignored. 5.2 08/13/2019 Improved NUM CPRS function. When compressing a multi-step number input into a single step, numbers starting inside a conditional statement are left unchanged. This preserves programming tricks like: x≠0? 1 0 0 + which would add 100 to x only if x was non-zero. 5.1 05/28/2019 • Improved TEXT Helper utility: enter any character by its number. Find any character using the built-in table. • Status of all flags at a glance: a set flag "n" is shown in register view as highlighted register number "n". • New function "Merge Sound Control" for more control on merge operations. See Extra Function -1 on cuveesoft.ch ("Extensions") for details. • New function "ln(1+x)": High-precision results for very small x See Extra Function 153 on cuveesoft.ch ("Extensions") for details. • New function "e^x-1": High-precision results for very small x See Extra Function 154 on cuveesoft.ch ("Extensions") for details. • New operation "CLR Flags": Clears all 10 flags. See Extended Function -2 on cuveesoft.ch ("Extensions") for details. • New operation "Integration Accuracy": Selects the accuracy of Numerical Integration See Extended Function -100 on cuveesoft.ch ("Extensions") for details. Bug fixes: • Papertape not showing underscore character in certain situations • Minor issues relating to merging program cards 5.0 04/11/2019 • In addition to multi-digit inputs, negative single-digit inputs are now compressed by NUM CPRS, e.g. the two steps "3" "CHS" into the single step "-3". • New function ln(x!): logarithm of factorial of any positive number See Extra Function 152 on cuveesoft.ch ("Extensions") for details. • Backstepping all input digits is not logged as CLX in TRACE mode anymore • Access RPN-67 homepage directly from info screen • Many under-the-hood refinements Bug fixes: • Display wasn't updated correctly when program got stopped by a breakpoint • Typing GTO n when the current step was LBL n would not find another possible LBL n 4.9 01/12/2019

RPN-67 Pro version 7.4

Updated At: 2026-03-03

Changes: • In the Card Manager ("Cards"), quickly scroll to the program code for any user key. For HP program cards, tap the desired label letter A..E for LBL A..LBL E. Long-press for LBL a..LBL e. For user program cards, simply tap the desired green label field. • Visual optimizations for iOS 26.

RPN-67 Pro version 7.3

Updated At: 2025-05-11

Changes: May 11, 2025 Version 7.3 • Faster startup – no delay until the first button press is recognized after switching on.

RPN-67 Pro version 7.3

Updated At: 2025-05-11

Changes: • Faster startup – no delay until the first button press is recognized after switching on.

RPN-67 Pro version 7.2

Updated At: 2025-03-09

Changes: Mar 9, 2025 Version 7.2 • In "Max" mode, results such as 9.99×10⁹⁹ now appear correctly rounded both in the display and on the printer for all decimal point settings, e.g. SCI DSP 1 (in contrast to the original HP-67). • Certain calculations, e.g. 100⁷⁵, caused the app to crash. • Fixed the info screen on the main view not showing up correctly.

RPN-67 Pro version 7.1

Updated At: 2024-11-04

Changes: Nov 4, 2024 Version 7.1 • In "Cards": Easier navigation to first, current, or last program step (tap "?" for details). • Fixed: The Info screen on the main view didn't show up correctly.

RPN-67 Pro version 7.0

Updated At: 2024-07-07

Changes: Jul 7, 2024 Version 7.0 • In interactive mode, the g-shifted functions in the top row (DAT+, DDYS, ...) automatically switch to the appropriate display format for the duration of the selected pause length. • Thousand separators are now supported in "High-Contrast Display Digits" mode. • In addition to using the Settings, you can toggle "High-Contrast Display Digits" by tapping the key f, then double-tapping the display. • Likewise, thousand separators may be toggled by tapping f, then triple-tapping the display. • Swiping the card slot left opens the Card Manager. • The default angular mode indicator DEG goes out after the selected pause length. • Updated math functions supporting the OP SOLAR command.

RPN-67 Pro version 6.9

Updated At: 2024-02-16

Changes: Feb 16, 2024 Version 6.9 • If "Enhancements" are set to "Off", loading a blank card will display "Error" without altering the program memory, like on a real HP-67. • Listing font changed from Courier to Menlo for better legibility. • Improved reliability of Location Services. If the iPad doesn't support GPS, turn off "Precise Location" in Settings/Privacy & Security/Location Services/RPN-67 Pro for best results. • Updated Extra Functions 22 and -22 ("Print Device Name" and "Print System Version") to reflect new naming conventions.

RPN-67 Pro version 6.8

Updated At: 2023-12-24

Changes: Dec 24, 2023 Version 6.8 • Infinity indicators are not shown if Enhancements are "Off". • Improved search function in Card Manager. • Fixed a crash on trying to load a card with register data protected by Touch ID or Face ID. • RPN-67 Pro runs on Apple Silicon Macs (see notes on homepage cuveesoft.ch). • RPN-67 Pro requires iOS 12 or later.

RPN-67 Pro version 6.7

Updated At: 2023-05-14

Changes: May 14, 2023 Version 6.7 • Enable or disable the flashing of pressed keys in the Settings ("Flash Keys"). • In enhanced modes (Enhancements "Med" or "Max"), the trigonometric mode indicator DEG appears only when "Large Display Digits" is on. No indicators are shown in vintage mode (Enhancements "Off"). • New Extra Functions: - "Save Warnings on" (#14) enables warnings of unsaved card changes - "Save Warnings off" (#-14) disables warnings of unsaved card changes - "CPLX Mode on" (#15) turns complex mode on - "CPLX Mode off" (#-15) turns complex mode off • Long-press the circled info button to call up the "What's New" screen.