GO-21 SciRPN

Name: GO-21 SciRPN
Price: 2.99 USD
Rating: 9.7 (12 reviews)

$2.99

6.6.3for iPhone, iPad and more

9.7

12 Ratings

Stephen Lidie

Developer

9.8 MB

Size

Mar 9, 2024

Update Date

Utilities

About GO-21 SciRPN

GO-21 SciRPN simulates the venerable HP-21 Pocket Scientific Calculator from 1975. Virtually indistinguishable from the real item in operation, GO-21 is a powerful yet simple retro calculator.

• RPN (Reverse Polish Notation)
• 10-digit LED calculator display, 10-99 to 10+99
• Four stack registers with roll down
• One storage register with arithmetic memory operators
• Math, trigonometric, polar/rectangular, logarithmic, power and other miscellaneous functions
• One additional window with views of:
◦ stack/storage registers
◦ keystroke log
• Copy-from and Paste-to the calculator display
• Simple Paper Tape annotations

What's New in the Latest Version 6.6.3

Last updated on Mar 9, 2024

Old Versions

- Miscellaneous improvements recommended for everyone.
- Update for iOS 17.4, iPadOS 17.4.

Version History

6.6.3

Mar 9, 2024

- Miscellaneous improvements recommended for everyone.
- Update for iOS 17.4, iPadOS 17.4.

6.6.1

Feb 22, 2024

- Improved look when magnified.

6.6

Feb 18, 2024

- New Settings option "Magnify Calculator", which creates a zoom-in effect that clips the periphery of the device body.
- Modern color picker for devices running iOS 14 or newer.
- Miscellaneous bug fixes.
- Update for iOS 17.3.1, iPadOS 17.3.1, tvOS 17.3, macOS 14.3.1.

6.5

Sep 14, 2022

- Support iPhone 14; cosmetic improvements for iPhones 5, 6, 7 and 8.
- Update for iOS 16, macOS 12.6, tvOS 16.

6.4

Feb 19, 2022

- New external keyboard action: typing M invokes the multiply function, eliminating a shift.
- Nerd alert: iOS versions >= 14 and macOS versions >= 11 now use the modern PHPicker photo chooser rather than the venerable UIImagePicker.
- Minor bug fixes and improvements.
- Update for iOS 15.3.1, macOS 12.2.1, tvOS 15.3.

6.3

Dec 20, 2020

- A blinking decimal point indicates battery power less than 5% (except Apple TV).
- New macOS Universal binary that runs on either Apple Silicon or Intel Macs.
- Update for iOS 14.3, macOS 11.1, tvOS 14.2.

6.2.1

Oct 14, 2020

- Support iPhone 12, update for iOS 14.0.1.

6.2

Oct 4, 2020

- Paper Tape Annotations now work on tvOS.
- Info enhanced when using tvOS.
- Experimental decimal math for the +, -, M+ and M- keys.
- Update for iOS 14.0, macOS 10.15.7, tvOS 14.0.

6.1.1

Sep 13, 2020

- Update GO-21 SciRPN's tvOS documentation and focus navigation for consistency with GO-25 SciRPN and GO-29 SciRPN.
- Update for iOS 13.7, macOS 10.15.6, tvOS 13.4.8.

6.1

Sep 1, 2020

- GO-21 SciRPN for Apple TV is now part of the universal purchase bundle.
- New background theme OS Appearance that tracks the OS's Appearance setting.
- 0^0 produces Error rather than evaluating to 1.

6.0

Aug 18, 2020

- Unified App that runs on all your devices.

5.7

Jun 27, 2020

- International hardware keyboard support for iOS and macOS.
- Similar to some CuVee Software products and with permission, add ability to annotate, clear, copy, email and print the Paper Tape.

5.6

May 31, 2020

- Implement hardware keyboard support for Mac and iPad.
- Ensure conformance with Apple's 2020.06.30 App Store guidelines.
- Update for iOS 13.5 and macOS 10.15.5.

5.5

Mar 20, 2020

- When selecting colors on macOS use the native color picker rather than the builtin iOS color picker.

5.4

Jan 31, 2020

- Remember visibility state of the stack view and restore appropriately across restarts.
- Automatic Display Switching: ensure switch to SCI 7, and repair display formats FIX 8 and FIX 9.
- Tweak Display Engine LED segments A and F.
- Improved memory management.

5.3

Jan 15, 2020

- For iPhones with a 5.5 inch display or larger there is a new Background Color or Picture setting.

5.2

Jan 10, 2020

- Add a Setting, High Visibility Display, so it's easier to view the calculator display in a very bright environment. The X register is shown in black on a white background, and each tiny LED display segment is drawn 33% larger.

5.1

Dec 27, 2019

- Mac Catalyst enhancements.
- Documentation updates.

5.0

Dec 22, 2019

- Share common code with GO-25 SciRPN and GO-29 SciRPN. This great internal refactoring resulted in external changes including, but not limited to:
. Default display rounding method changed to Half Away From Zero, which may affect displayed results. Use Half To Even in Settings to revert to the previous behavior.
. New stack / memory Register and paper tape Keystroke views. Use the switch-views control to alternate between them.
. Use new Appearance dark / light module (WkWebView) to render HTML throughout.
- New Key Tap Feedback option Haptic Feel that uses touch feedback rather than sound to indicate a key tap, assuming your device includes the feature and that it is enabled in Settings.
- Update for iOS 13.3.
- Update for iPadOS 13.3 and macOS Catalina 10.15.2: this means that GO-21 now runs on your friendly Macintosh computer!
- Minimum iOS version is 9.0; minimum macOS version is 10.15.

4.15

Jul 15, 2019

- Update for iOS 12.3.1.

4.14

Mar 24, 2019

- Update for iOS 12.1.4.
- Documentation now supports BigCatOs Appearances.

4.13

Sep 18, 2018

- Update for iOS 12.0.
- Do not raise the stack when using the EEX shortcut immediately after an ENTER.

4.12.1

Sep 8, 2018

- Fix format issue with iPhone 6/6s/7/8.