Calculator + vs Calculator RPN
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator +
This app offers a free basic and scientific calculator with an intuitive interface. It supports fractions, percentages, and advanced editing. Optional upgrades provide specialized calculators for fractions with units, polynomial and linear equation solving, graphing, and geometric shapes.
- Free basic and scientific calculator
- Intuitive interface with equation and result display
- Fraction and percent support
- Advanced editing capabilities
- Polynomial and linear equation solver
- Graphing calculator
- Unit conversion and geometric calculators
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Award winning calculator app for iPad and iPhone. Designed with simplicity, usability and beauty in mind! FEATURES: - Free basic calculator - Free scientific calculator - Elegant & Intuitive interface - Advanced editing by easily going back and forth - Displays both the equation & the result at the same time - Supports Fraction & Percent - Supports many scientific functions If you are looking for more advanced features you can upgrade to one or more of the following: - Fraction Calculator with feet, inches & cm support! - Solving for x with a polynomial Calculator for solving quadratic & cubic equations 2x³ - 4x² - 22x + 24 = 0 - Linear Equations Solver for solving system of linear equations 2x – y = 9 3x + 4y = –14 - Graphing Calculator to find the local min, max & intersection points y = 2x³ – 4x (x² + y²)³ = -27y²x² - Triangle Calculator - Cone Calculator - Arc Calculator - Circle Calculator - Base Converter ( HEX OCT BIN DEC ) - Multiple themes Enjoy the FREE Scientific calculator on your iPhone & iPad. If you like it, support us by upgrading or giving us a positive review. Thanks :) Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Calculator RPN
This scientific calculator offers Reverse Polish Notation (RPN) for faster calculations. It includes 54 mathematical functions, coordinate conversions, and unit conversions, all within a simple interface.
- RPN calculation mode
- 54 mathematical functions
- Trigonometry (simple and hyperbolic)
- Coordinate and unit conversions
- Degrees and radians support
- Simple interface
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On this calculator you will be able to benefit from all the functions of a scientific calculator and RPN with the new iOS calculator. Thanks to the RPN mode you will be able to calculate sums at great speed which greatly reduces the typing. With a simple and uncluttered interface design, this calculaor includes 54 mathematical functions such as : • basic functions like natural logarythms, square roots and factorials • trigonometry (simple and hyperbolic) • it convertes polar and rectangular coordinates, decimal hours, hours, minutes and seconds • it can calculate degrees and radians And much more This calculator uses the very efficient and much talked about RPN system used by engineers and scientists, now on iOS.
Screenshots
Verdict
The clearest difference is price: Calculator + at Free against Calculator RPN's $4.99. Calculator + also leads on ratings volume (10K vs 48) and review sentiment (85% vs 60%). Calculator RPN's advantage is in-app purchases (none vs 12) and ads (none vs shown). On rating 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 + is free to download; Calculator RPN costs $4.99 up front. Calculator + sells 12 in-app purchases, starting at $4.99 per month. Calculator RPN asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.6 for Calculator + against 4.7 for Calculator RPN. That said, the two scores are not equally well evidenced: Calculator + has 10K ratings behind it against 48, so its average is the more settled of the two. Written reviews are what separate them: 85% of Calculator +'s written reviews are positive against 60% of Calculator RPN's.
Calculator + ships an update every 5 days, Calculator RPN every 3 weeks. The most recent releases landed on November 1, 2026 and October 22, 2026 respectively.
| Parameter | Calculator + | Calculator RPN |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 4.6 (10K ratings) | 4.7 (48 ratings) — better |
| Positive reviews | 84.9% of reviews — better | 60.0% of reviews |
| Number of ratings | 10K — better | 48 |
| Update frequency | Every 5 days — better | Every 3 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Mac, Apple Watch — better |
| Requires iOS | 16.4 | 14.0 — better |
| Further details — not scored | ||
| Size | 50 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | xNeat.com | Benjamin Pisano |
Customer experience
Calculator +
Calculator RPN
Bugs and requests
Calculator +
Reported bugs
5 issues- Fraction calculator has TWO subtraction buttons and NO division button
- Decimals seem to be changed to fraction with no apparent way of changing it back
- Functionality is dropped by forcing you to the main menu every time you open it
- Currency converter broken
- Login screen freezes
Requested features
5 requests- Add mod function
- Add commas
- Add 1/x function
- Support for Retina Display
- Add number 4 with two lines
Calculator RPN
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Calculator +
- Scientific Calculator3 Days trial$4.991 Month
- Calculator7 Days trial$39.991 Year
- Linear Calculator$2.99
- Factoring Calculator$2.99
- Handwriting Calculator$2.99
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- Currency Converter$2.99
- Themes Pack$2.99
- Graphing Calculator$3.99
- Fraction Calculator$3.99
- Scientific Calculator$4.99
- Calculator Plus$4.99
- Calculator$16.99
Calculator RPN
No in-app purchases
Questions
Is Calculator + free?
Is Calculator RPN free?
Which has better reviews, Calculator + or Calculator RPN?
Do Calculator + or Calculator RPN have ads?
Which is updated more often, Calculator + or Calculator RPN?
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