Calculator RPN is a scientific calculator for iOS that uses Reverse Polish Notation (RPN) input for engineering and academic workflows.
The App DNA
What makes this app unique?
It removes the keystroke overhead of standard algebraic calculators, allowing scientists to process complex sums with higher speed.
For Engineers, scientists, and students requiring specialized RPN scientific calculation workflows.
What does it look like?
Key features
Reverse Polish Notation input system for scientific calculations, reducing keystrokes compared to standard algebraic entry.
Includes 54 mathematical functions covering trigonometry, hyperbolic functions, logarithms, and unit conversions.
Minimalist UI design focused on high-speed data entry for scientific workflows.
How much does it cost?
Paid model at $4.99 price point targets professional users seeking a dedicated, ad-free scientific tool.
Velocity
Dormant developmentopaqueShow more...
Calculator RPN has been inactive for 1,568 days, placing it firmly in the zombie category. The development history shows no evidence of updates, feature additions, or maintenance for over four years. Given the lack of recent activity, there is no current development momentum to report.
Who built it?
User Sentiment
What do users think recently?
How are ratings & reviews evolving?
Not enough recent reviews to extract reliable themes yet.
Read the full review analysisCompetition
Competitive landscape for Calculator RPN
How's the Utilities market?
Calculator RPN holds a stable, niche position in the Utilities category with a 4.68 rating across 48 reviews. The lack of updates since April 2022 signals a maintenance-only posture that limits its ability to compete with modern, cloud-integrated scientific tools.
Read the market outlookThe rivals identified
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Access the full report for freeThe Analyst's Read
Key takeaways for Calculator RPN
Where is it heading?
The scientific utility market is increasingly favoring cloud-integrated tools that sync data across devices. Calculator RPN remains a legacy-style tool that serves a specific RPN-focused segment, but its lack of updates since 2022 limits its growth potential against modern, feature-rich alternatives.
- The app has remained in maintenance mode for over four years, signaling a stable but stagnant product lifecycle.
The SWOT
- RPN input system reduces keystrokes for scientific calculations
- Localized pricing in high-ARPU markets
Next best moves
Audit current codebase for iOS compatibility because the app has not been updated since 2022 → maintain baseline functionality
The counter-intuitive read
The app's four-year silence is a feature, not a bug…
Read the full takeSince the last report: The app remains in a maintenance-only state with no functional updates. The primary shift is a strategic pivot in the SWOT analysis, which now identifies localized pricing as an opportunity rather than focusing on cloud-sync feature gaps.
Bottom line
Calculator RPN maintains a stable position for power users who value the RPN workflow, but the lack of updates since 2022 leaves the app vulnerable to modern competitors that offer cloud-sync and active feature support.
Unlock 1 critical friction, 1 market threat and the analyst’s take.
Access the full report for freeFAQ
Is Calculator RPN suitable for students?
Does Calculator RPN receive regular updates?
What is the main difference between this and a standard calculator?
Sources
- [1] App Store, source
Report last updated