RPN-97 Pro 7.5 - App Store

RPN-97 Pro version 7.5

Updated At: 2026-06-20

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. • Bug fix: Register arithmetic didn't work as expected when printer mode was set to TRACE or NORM (thanks, Wesley). 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-97). • Certain calculations, e.g. 100⁷⁵, caused the app to crash. 7.2 03/09/2025 • In "Cards": Easier navigation to first, current, or last program step (tap "?" for details). • Bug Fix: Entering a LBL command with a lower-case argument would be stored as GSB command. 7.1 11/04/2024 • 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 f, then double-tapping the display. • Thousand separators may be toggled by tapping f, then triple-tapping the display. • Swiping the card right slot 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-97. • 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-97 Pro for best results. • Updated Extra Functions 22 and -22 ("Print Device Name" and "Print System Version") to reflect the current naming conventions. • Replaced defective "HP-97 Owners's Handbook" on the website cuveesoft.ch Bug Fix • In Trace mode, LBL or GTO or GSB followed by ENTER would log as LENT or OENT or BENT instead of ENT. 6.9 02/16/2024 • Infinity indicators are disabled if Enhancements are "Off". • Fixed a crash on trying to load a card with register data protected by Touch ID or Face ID. • Fixed misleading naming of functions on the paper tape, e.g. RCL COS would log as CLCOS instead of COS. • Fixed STO/RCL not showing the option STK below the ENTER key. • RPN-97 Pro runs on Apple Silicon Macs (see notes on homepage cuveesoft.ch). • RPN-97 Pro requires iOS 12 or later. 6.8 12/19/2023 • Enable or disable the flashing of pressed keys in the Settings ("Flash Keys"). • In enhanced modes ("Med" and "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. • Download RPN-97 Pro from the Mac App Store to any Mac with an M1-chip (or later) running macOS 11.0 or higher. You will not be charged again. 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 fix: • In PRGM mode, suppress illegal commands LBL ∑+, GTO ∑+, GSB ∑+, and DSP ∑+. 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≷R/S. • In Card Manager, fixed external keyboard not responding in certain situations. • Corrected 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-67 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-97 and RPN-67 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 • New print • 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 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. 6.3 07/07/2020 • Simplified installation of a user background image via Files app (see website, "Settings") • Execute keys LBL (option-L) and GSB (option-G) using a hardware keyboard • 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 an Jan 1, 1939) • Additional commands for external keyboard: – option-P: π - control-$: ∑- - control-L: Last x Download the complete list from the cuveesoft.ch homepage. 6.2 04/08/2020 For compatibility with other Cuvee Software apps, the following key commands have been reassigned: - GTO: from G to T - TXT: from shift-cmd-T to cmd-T - TEXT from cmd-T to shift-cmd-T - The print mode may additionally be changed by ctrl-P Bug fix: - ctrl-I didn't execute (i) 6.1.1 03/17/2020 • 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. • If the HP dot-matrix font is enabled in vintage mode, printing is accompanied by sounds of a real HP-97. • The HP dot-matrix printer font may be turned on or off by a switch in the settings, in addition to the extended command PRT MODE. Bug fix: • Using scientific notation could crash the app in some regions, i.e. Australia, Sweden. 6.1 02/19/2020 • 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 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-97 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 f DEL in RUN mode • Delete all program steps from the current step to the end by pressing EXT DEL in any 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 label, 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" allowing sophisticated merge operations. See Extra Function -1 on cuveesoft.ch ("Extensions") for details. • New function "ln(1+x)": See Extra Function 153 on cuveesoft.ch ("Extensions") for details. • New function "e^x-1": See Extra Function 154 on cuveesoft.ch ("Extensions") for details. • New function "CLR Flags": Clears all 10 flags. See Extended Function -2 on cuveesoft.ch ("Extensions") for details. • New function "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 a 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-67/97 homepage directly from the 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-97 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. • Bug fix: Register arithmetic didn't work as expected when printer mode was set to TRACE or NORM (thanks, Wesley).

RPN-97 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-97 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-97 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-97). • Certain calculations, e.g. 100⁷⁵, caused the app to crash.

RPN-97 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). • Bug Fix: Entering a LBL command with a lower-case argument would be stored as GSB command.

RPN-97 Pro version 7.0

Updated At: 2024-07-07

Changes: Jul 7, 2024 Version 7.0 • 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 f, then double-tapping the display. • Thousand separators may be toggled by tapping f, then triple-tapping the display. • Swiping the card right slot 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-97 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-97. • 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-97 Pro for best results. • Updated Extra Functions 22 and -22 ("Print Device Name" and "Print System Version") to reflect the current naming conventions. • Replaced defective "HP-97 Owners's Handbook" on the website cuveesoft.ch Bug Fix • In Trace mode, LBL or GTO or GSB followed by ENTER would log as LENT or OENT or BENT instead of ENT.

RPN-97 Pro version 6.8

Updated At: 2023-12-19

Changes: Dec 19, 2023 Version 6.8 • Infinity indicators are disabled if Enhancements are "Off". • Fixed a crash on trying to load a card with register data protected by Touch ID or Face ID. • Fixed misleading naming of functions on the paper tape, e.g. RCL COS would log as CLCOS instead of COS. • Fixed STO/RCL not showing the option STK below the ENTER key. • RPN-97 Pro runs on Apple Silicon Macs (see notes on homepage cuveesoft.ch). • RPN-97 Pro requires iOS 12 or later.

RPN-97 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 ("Med" and "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. • Download RPN-97 Pro from the Mac App Store to any Mac with an M1-chip (or later) running macOS 11.0 or higher. You will not be charged again.