Comparison

Calculator₊ vs QuaternionCalc

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 comprehensive suite of calculation tools, including basic, scientific, and unit conversions. It features an AI-powered math solver that can solve problems from photos and provides a dedicated space for math notes. Accessibility features ensure ease of use for all users.

Highlights
  • Basic and scientific calculations
  • Unit and currency converter
  • AI-powered math solver with photo recognition
  • Math notes with instant solutions
  • Calculation history log
  • Accessibility features (Dynamic Text Size, VoiceOver, High-Contrast Mode)
Features
Read full description

America's #1 Calculator App! Download Calculator₊ Now - Your All-in-One Math Solution! We're excited to announce the biggest update to Calculator₊ in 10 years! With over 200 million downloads and a whopping 3 million+ 5-star ratings, Calculator₊ is the trusted choice of millions worldwide. And now, it's even better! More Than Just Your Average Calculator! • Standard Calculator: Breeze through basic arithmetic operations like addition, subtraction, multiplication, and division. • Scientific Calculator: Tackle complex calculations with ease, including trigonometric, logarithmic, and exponential functions. • Calculation History: Keep track of your past calculations with a detailed history log. • Unit Converter: Effortlessly convert units like inches to centimeters and much more, making it a handy tool for everyday use. • Percentage Calculator: Easily calculate percentages, increases, and decreases with pre-designed input fields that do the work for you. • Currency Converter: Convert currencies in real-time, including Bitcoin, with the latest exchange rates. • Fraction Calculator: Work seamlessly with fractions – perfect for students and professionals alike. • Ad-Free Experience: Say goodbye to annoying full-screen ads and focus on your calculations. Be Amazed by Our New AI-Powered Math Solver! • AI Math Solutions: Instantly solve math equations, quizzes, and word problems with our advanced AI. Use the Photo Solver to snap a picture of any problem, and Calculator₊ will work its magic. • Math Notes: A dedicated note-taking tool for all your math needs. Jot down equations, diagrams, and notes in a space designed for mathematical thinking. • Instant Math: In Math Notes mode, simply write an equation, add an "=", and Calculator₊ will generate the solution in real-time. Built for Everyone, Now Even More Accessible! Calculator₊ is designed to work effortlessly for all users, no matter how you use your iPhone, and includes these additional accessibility features: • Dynamic Text Size: Scale the calculator interface to the text size that works best for you, without losing layout clarity. • VoiceOver Support: Navigate & Calculate using VoiceOver, fully compatible with iOS accessibility settings. • High-Contrast Mode: A bold, high-contrast display that makes every button and result instantly readable in any lighting condition. • Dark and Light Mode: Calculator₊ automatically adjusts to your preferred mode. Why Choose Calculator₊? • Proven Track Record: Over a decade of providing fast and reliable calculations. • Loved by Millions: Join the 200+ million users who rely on Calculator₊, with an average rating of 4.7 stars from 3.5 million reviews. • Versatile & Powerful: Handles everything from basic sums to advanced scientific calculations. Perfect for school, work, or home. Celebrate with a Special Gift! To celebrate the release of this massive update, we're offering a 1-MONTH FREE TRIAL of our premium features, including: • Ad-Free Experience: No more pesky ads. • Unlimited AI Math Solving: Solve as many equations and problems as you need. • Unlimited Fraction Calculations: Ideal for students and professionals alike. • Unlimited Currency Conversions: Including real-time Bitcoin conversions. • Premium Customer Support: Get priority assistance from our expert support team. If you have any suggestions or questions, our support team is ready to help. Simply email us at support@impalastudios.com. Terms & Conditions: https://impalastudios.com/terms Privacy Policy: https://impalastudios.com/privacy

About

QuaternionCalc

Features
Read full description

Performs quaternion operations. Includes operations are quaternion transpose, quaternion multiplication, forward transformations, reverse transformations, conversion from quaternion to Euler angles and generation a quaternion from two unit vectors.

Screenshots

Calculator₊4 screens
QuaternionCalc1 screens

Verdict

The call

The clearest difference is price: Calculator₊ at Free against QuaternionCalc's $2.99. Calculator₊ also leads on update cadence (every 3 weeks vs every 15 months) and chart position (#96 vs unranked). QuaternionCalc's advantage is in-app purchases (none vs 10) and ads (none vs shown).

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; QuaternionCalc costs $2.99 up front. Calculator₊ sells 10 in-app purchases, starting at $0.99 per month. QuaternionCalc asks for nothing beyond the download.

UpkeepUpdate frequency

Calculator₊ ships an update every 3 weeks, QuaternionCalc every 15 months. The most recent releases landed on November 13, 2026 and November 6, 2026 respectively.

Scorecard7 real differences · 4 level
Calculator₊ versus QuaternionCalc: the parameters behind the verdict, then further details
ParameterCalculator₊QuaternionCalc
PriceFree — better$2.99
Rating4.7 (1.7M ratings) — better—
Positive reviews63.1% of reviews—
Number of ratings1.7M — better—
Update frequencyEvery 3 weeks — betterEvery 15 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank#96 — better—
DevicesiPhone, iPad, iPod, Apple Watch, Vision Pro — betteriPhone, iPad
Requires iOS15.0 — better18.0
Further details — not scored
Size247 MB2 MB
Age rating4+4+
DeveloperImpala StudiosPrinceton Satellite Systems

Bugs and requests

Calculator₊

Reported bugs

2 issues
  • Incorrect calculation results for certain functions
  • Inability to delete last entered digit without clearing entire calculation

Requested features

3 requests
  • Ability to delete individual calculation history entries
  • More free advanced calculator features (fractions, currency, etc.)
  • Improved ad placement that doesn't interfere with usage

QuaternionCalc

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Calculator₊

Subscriptions10
  • Premium Member Special Offer7 Days trial$0.991 Month
  • Monthly Premium Member3 Days trial$0.991 Month
  • 1 Month Premium Access7 Days trial$1.491 Month
Show 7 more
  • Half-Yearly Premium Member3 Days trial$3.996 Months
  • Calculate Faster, AI, & No Ads3 Days trial$4.997 Days
  • 1 Year Ad-Free3 Days trial$5.991 Year
  • Calculate Faster, AI, & No Ads3 Days trial$5.997 Days
  • 1 Month Premium Trial1 Month trial$5.997 Days
  • Math Solver/Full Access/No Ads$5.997 Days
  • 6 Months Premium Access7 Days trial$8.996 Months
None

QuaternionCalc

No in-app purchases

Questions

Is Calculator₊ free?
Calculator₊ is free to download, with in-app purchases available.
Is QuaternionCalc free?
QuaternionCalc costs $2.99, with no in-app purchases.
Do Calculator₊ or QuaternionCalc have ads?
Calculator₊ shows ads; QuaternionCalc does not.
Which is updated more often, Calculator₊ or QuaternionCalc?
Calculator₊ ships an update every 3 weeks, and QuaternionCalc every 15 months. Most recently, Calculator₊ was updated on November 13, 2026 and QuaternionCalc on November 6, 2026.

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