Comparison

Calculator + vs Dozecal

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

Dozecal

This educational calculator promotes the use of Base Twelve (duodecimal) in math and science. It offers standard mathematical functions in both duodecimal and decimal modes, with automatic conversion between them. It utilizes Reverse Polish Notation (RPN) for calculations.

Highlights
  • Duodecimal and Decimal modes
  • Automatic mode conversion
  • RPN (Reverse Polish Notation) input
  • Standard math functions
  • Trigonometric operations (degrees)
  • Educational tool for Base Twelve
Features
Read full description

Dozecal is an educational RPN* calculator to promote the use of Base Twelve in math and science. The usual math functions are available in both DUODECIMAL and DECIMAL modes. Conversion is automatically made when switching from one mode to the other one. Trigonometric operations uses DEGREE as unit of measure. For more information about Base 12, please visit the Dozenal Society of America. * RPN : the Dozecalc calculator uses the Reverse Polish Notation (RPN). This notation seems complex but has many advantages over algebraic notation and is more intuitive once you have understood the idea. The calculator has a stack and any operation that requires two numbers is using the bottom stack layers (X and Y). Key ENTER to push the stack up and separate one number from the next. To perform arithmetic, key in the first number, press ENTER to separate the first number from the second, then key in the second number and then select and operator such as the numerical functions +, -, * or /. The result appears immediately after you press the numerical function key. The operator is keyed in only after both operands are in the stack. Example: calculate 3 + 4 Key sequence: 3 ENTER 4 + Result: 7 The result of any operation may itself become an operand. You do not need to press enter again to use the result. The "7" is already entered. Example: add 2 to the previous result Key sequence: 2 + Result: 9 Example: calculate 5 * (3 + 4) Key sequence: 3 ENTER 4 + 5 * Alternate key sequence: 5 ENTER 3 ENTER 4 + * Disclaimer: results and precision may occasionally be incorrect. Should you report them at johan@unumdesignum.com, and the author will be happy to fix !

Screenshots

Calculator +1 screens
Dozecal4 screens

Verdict

The call

The clearest difference is rating: Calculator + at 4.6 against Dozecal's 4.0. Calculator + also leads on update cadence (every 5 days vs every 10 months) and ratings volume (10K vs 4). Dozecal's advantage is in-app purchases (none vs 12) and ads (none vs shown). On price and device support 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

Both are free to download. Calculator + sells 12 in-app purchases, starting at $4.99 per month. Dozecal asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Calculator + holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Calculator + has 10K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 85% of Calculator +'s written reviews are positive against 75% of Dozecal's.

UpkeepUpdate frequency

Calculator + ships an update every 5 days, Dozecal every 10 months. The most recent releases landed on October 17, 2026 and October 2, 2026 respectively.

Scorecard8 real differences · 2 level
Calculator + versus Dozecal: the parameters behind the verdict, then further details
ParameterCalculator +Dozecal
PriceFreeFree
Rating4.6 (10K ratings) — better4.0 (4 ratings)
Positive reviews84.9% of reviews — better75.0% of reviews
Number of ratings10K — better4
Update frequencyEvery 5 days — betterEvery 10 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.412.0 — better
Further details — not scored
Size49 MB27 MB
Age rating4+4+
DeveloperxNeat.comJohan Kovacs

Customer experience

Calculator +

All ratings10,181 ratings
Positive91.8%
Neutral2.8%
Negative5.4%
Written reviews941 reviews
Positive84.9%
Neutral4.0%
Negative11.1%

Dozecal

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

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

Dozecal

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

Dozecal

No in-app purchases

Questions

Is Calculator + free?
Calculator + is free to download, with in-app purchases available.
Is Dozecal free?
Dozecal is free to download, with no in-app purchases.
Which has better reviews, Calculator + or Dozecal?
Calculator + is rated higher. Calculator + averages 4.6 out of 5 from 10K ratings, while Dozecal averages 4.0 from 4 ratings.
Do Calculator + or Dozecal have ads?
Calculator + shows ads; Dozecal does not.
Which is updated more often, Calculator + or Dozecal?
Calculator + ships an update every 5 days, and Dozecal every 10 months. Most recently, Calculator + was updated on October 17, 2026 and Dozecal on October 2, 2026.

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