RPN Calc Pro

Utilities

Only for iPhone

$2.99 · Designed for iPhone. Not verified for macOS.

iPhone

RPN CALC PRO - Classic Reverse Polish Notation A professional scientific calculator for engineers, scientists, and RPN enthusiasts. Experience the efficiency of Reverse Polish Notation with a clean, modern interface. RPN Calc Pro is provided for general use. Results should be independently verified for any critical application. SparkStream, LLC is not responsible for errors arising from use of this app. FEATURES: - Full 4-level stack display (T, Z, Y, X registers always visible) - Complete scientific function set - Trigonometric functions (sin, cos, tan, and inverses) - Logarithmic and exponential functions - Power and root operations - Memory storage and recall - Stack manipulation (swap, roll) - Degree mode for all trig functions - Clean, distraction-free interface - No ads, no tracking, no subscriptions PERFECT FOR: - HP calculator users - Engineering students and professionals - Scientists and researchers - Anyone who appreciates efficient calculation methods WHAT IS RPN? Reverse Polish Notation is a mathematical notation where operators follow operands. It eliminates the need for parentheses and allows for faster, more intuitive calculations once learned. NO ADS. NO TRACKING. JUST CALCULATIONS.

Ratings & Reviews

  • 5.0
    out of 5
    1 Ratings

• Improved error handling — divide by zero, invalid operations now show a clear "Error" state instead of silent failures • Calculator state now persists between app launches — your stack, memory, and mode settings are saved • Larger, more readable button labels and stack display • Scientific notation entry improved — ± now correctly toggles exponent sign • T-register now replicates after operations, matching classic HP RPN behavior • VoiceOver accessibility support added for all buttons and display registers • Removed unused code and reduced app footprint

Version 1.4

The developer, SparkStream, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • SPARKSTREAM, LLC
    Size
    • 347.1 KB
    Category
    • Utilities
    Compatibility
    Requires iOS 18.5 or later.
    • iPhone
      Requires iOS 18.5 or later.
    • Mac
      Requires macOS 15.5 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 2.5 or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • © 2025 SparkStream Games, LLC
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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