RPN 28x Calc 3.5.4

RPN 28x Calc is a programmable scientific calculator featuring a classic design, offering a modern and user-friendly experience where operands can be interacted with via the display's touch capabilities.

Being a reverse-polish notation (RPN) calculator, it showcases a dynamic stack display that conveniently expands as more values are added. Navigation through the display on an iPad is effortless - simply swipe for more lines or reorder levels and modify stack values as needed.

Advanced functionalities are accessible through a secondary panel on iPad or as alternative button pages on iPhone. The interface is thoughtfully organized into five pages for quick access:

• user-defined buttons,
• letters A-Z for typing,
• trigonometric, logarithmic, and data manipulation commands,
• statistics, storage and programming commands,
• binary integers, system flags and boolean logic.

RPN 28x Calc distinguishes itself in various aspects:

• Select and issue commands for a chosen level by tapping a row.
• Rearrange the stack by dragging rows in REORD mode.
• Scroll through levels by swiping the display up or down.
• Efficiently reposition the cursor by tapping digit keys when entering values.
• Modify status indicators at the top of the display with a tap.
• Customize button layout by dragging buttons - configure this option in settings.

Exclusive to iPad:

• The display automatically adjusts to show more than four stack levels.
• Easily navigate button pages by sliding the secondary panel in or out of view.

Additional features include:

• 147 scientific units and elementary physical constants,
• Commands for upper-tail probability distribution,
• Interactive program debugging.

• RPN 28x Calc provides:

• • High-precision arithmetic calculations,
  • Support for multiple data types such as real numbers, complex numbers, binary integers, lists, arrays, vectors, matrices, programs, names, and strings,
  • Customizable variables creation with a variable viewer for inspection,
  • A rich command set for programming,
  • Button creation and reordering for personalized programs,
  • Browsing of scientific units and constants in the units viewer,
  • Access to command history and results in the log viewer,
  • Adjustable button click and alert volumes,
  • Landscape orientation support,
  • Haptic feedback on iPhone,
  • External keyboard compatibility,
  • Dark Appearance mode since iPadOS 13 or iOS 13,
  • An alternative dark app icon,
    
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The application ensures a smooth cross-device experience between iPad and iPhone. Use it conveniently across various iPad multitasking views, like Slide Over or Split View. RPN 28x Calc prides itself on being ad-free, respecting user privacy with no tracking or intrusive rating requests. Furthermore, a downloadable user guide detailing an introduction and command reference is available in PDF format.

Promised updates include support for arithmetic expressions in future releases, enhancing functionality and versatility even further.