Comparison

Calculator + vs Calculator RPN

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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/

About

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.

Highlights
  • RPN calculation mode
  • 54 mathematical functions
  • Trigonometry (simple and hyperbolic)
  • Coordinate and unit conversions
  • Degrees and radians support
  • Simple interface
Features
Read full description

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

Calculator +4 screens
Calculator RPN4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard9 real differences · 1 level
Calculator + versus Calculator RPN: the parameters behind the verdict, then further details
ParameterCalculator +Calculator RPN
PriceFree — better$4.99
Rating4.6 (10K ratings)4.7 (48 ratings) — better
Positive reviews84.9% of reviews — better60.0% of reviews
Number of ratings10K — better48
Update frequencyEvery 5 days — betterEvery 3 weeks
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, iPod, Mac, Apple Watch — better
Requires iOS16.414.0 — better
Further details — not scored
Size50 MB16 MB
Age rating4+4+
DeveloperxNeat.comBenjamin Pisano

Customer experience

Calculator +

All ratings10,255 ratings
Positive91.8%
Neutral2.8%
Negative5.3%
Written reviews942 reviews
Positive84.9%
Neutral4.0%
Negative11.0%

Calculator RPN

All ratings48 ratings
Positive91.7%
Neutral0.0%
Negative8.3%
Written reviews45 reviews
Positive60.0%
Neutral8.9%
Negative31.1%

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

12 purchases

Calculator +

Subscriptions2
  • Scientific Calculator3 Days trial$4.991 Month
  • Calculator7 Days trial$39.991 Year
One-time10
  • Linear Calculator$2.99
  • Factoring Calculator$2.99
  • Handwriting Calculator$2.99
Show 7 more
  • 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
None

Calculator RPN

No in-app purchases

Questions

Is Calculator + free?
Calculator + is free to download, with in-app purchases available.
Is Calculator RPN free?
Calculator RPN costs $4.99, with no in-app purchases.
Which has better reviews, Calculator + or Calculator RPN?
Calculator RPN is rated higher. Calculator + averages 4.6 out of 5 from 10K ratings, while Calculator RPN averages 4.7 from 48 ratings.
Do Calculator + or Calculator RPN have ads?
Calculator + shows ads; Calculator RPN does not.
Which is updated more often, Calculator + or Calculator RPN?
Calculator + ships an update every 5 days, and Calculator RPN every 3 weeks. Most recently, Calculator + was updated on November 1, 2026 and Calculator RPN on October 22, 2026.

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