RPN vs Calculator Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RPN
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The basic four function calculator displays numbers in fixed format. The scientific calculator has 75 built-in functions covering logarithms, powers, roots, trigonometric, date, time, memory operations, statistics, and probabilities and up to four user defined macro functions. It displays numbers in user configurable fixed, scientific, or engineering formats. The user configurable calculator has sixteen user configurable function buttons that can each be assigned two functions from 75 built-in functions and access an unlimited number of user defined macro functions. It displays numbers in user configurable fixed, scientific, or engineering formats. The programmer’s calculator has a hexadecimal keypad and displays numbers in user configurable hexadecimal format. It has four basic mathematics, six bitwise, and two shift functions. All calculators share an operation history display for ease of reviewing computations and extensive in-app help documentation. Numbers can be copied to and pasted from the clipboard for ease of use with other applications.
Calculator Pro
This comprehensive toolkit offers standard and scientific calculations, currency and unit conversions, and financial planning tools. It features a clean interface with multi-language support and customizable options for everyday math needs.
- Standard and scientific calculator modes
- Real-time currency conversion
- Extensive unit converter
- Mortgage and finance estimators
- Calculation history and widget
- Multi-language support
- Dark Mode
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Calculator Pro brings a scientific calculator, a currency converter, a unit converter, and number-base conversion together in one place. Compare exchange rates on a single screen, convert units and number bases, calculate percentages and discounts, and revisit recent calculations with a Home Screen widget. Depending on your region and language, you can also access useful tools for dates, mortgages, savings estimates, and more. CURRENCY CONVERTER Keep your frequently used currencies together in an editable list. Compare travel money and prices across currencies at a glance. Exchange rates may be delayed and are for reference only. UNIT CONVERTER Enter a value once and compare supported units across length, mass, temperature, time, area, volume, speed, engineering, electricity, and digital storage. EVERYDAY CALCULATORS Use base conversion, BMI estimation, random numbers, percentages, discounts, and other practical tools. SCIENTIFIC CALCULATOR Perform everyday arithmetic and scientific calculations, including trigonometric functions, logarithms, exponents, roots, and factorials. Switch between degree and radian modes. CALCULATION HISTORY AND WIDGET Review previous calculations and continue from an earlier result. Use the Home Screen widget to access recent calculations. Exchange rates and financial estimates are for informational purposes only. BMI is an estimate, not a medical assessment. These tools do not constitute investment, medical, tax, or legal advice. Verify important decisions with appropriate official or professional sources. Terms of Use: https://iorangepie.com/supercalculator/terms.html Privacy Policy: https://iorangepie.com/supercalculator/privacy.html
Screenshots
Verdict
The clearest difference is price: Calculator Pro at Free against RPN's $4.99. Calculator Pro also leads on update cadence (every 10 days vs every 7 months). RPN's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Calculator Pro is free to download; RPN costs $4.99 up front. Calculator Pro sells 1 one-off in-app purchase. RPN asks for nothing beyond the download.
RPN ships an update every 7 months, Calculator Pro every 10 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | RPN | Calculator Pro |
|---|---|---|
| Price | $4.99 | Free — better |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Every 7 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 16.6 — better | 17.6 |
| Further details — not scored | ||
| Size | 1 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Steven Davies | LOVE ORANGE TECHNOLOGY CO.,LTD |
In-app purchases
RPN
No in-app purchases
Calculator Pro
- Lifetime Pro$4.99
Questions
Is RPN free?
Is Calculator Pro free?
Do RPN or Calculator Pro have ads?
Which is updated more often, RPN or Calculator Pro?
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