Comparison

Quadratic Master vs functionCalculator

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

Head to head
About

Quadratic Master

This app helps users solve and learn about quadratic equations, inequations, and functions. It offers tools for students and professionals, including solvers, formulas, and visual aids like 3D parabola models. Share solutions and explore function graphs with this educational math tool.

Highlights
  • Quadratic equation solver
  • Quadratic inequation solver
  • Quadratic function solver
  • 3D rotating parabola model
  • Graph mixer
  • Detailed solution explanations
Features
Read full description

Quadratic Master is the best app for solving and learning quadratic equations, inequations, and functions on your iPhone. Whether you are a high-school student currently learning about quadratics in your math class or somebody who needs to solve quadratic functions on a regular basis, Quadratic Master is for you. Main benefits: • Save time on your math homework • Learn about quadratics in just a fraction of time • Share solutions with your classmates. Free version offers: • Quadratic equation solver (roots, discriminant, factorization) • Formulas and guide for manually solving quadratic equations • Quadratic inequation solver Quadratic function solver (Vertex form) 3D rotating model of parabola for better understanding of quadratics in geometry Full version provides: • Detailed solution for quadratic equations • Quadratic function solver - general and factored form • Explanations and formulas for all quadratic function properties • Quadratic inequation solver with ≥ and ≤ inequality • Graph mixer - the perfect tool to play with and explore quadratic function graphs Rapid-fast solving with Single-digit input mode The full version is available for a small one-time fee. - - - - - I’ve built Quadratic Master back in 2009 when I was in high school and I was learning about quadratic equations in my math class. It is the first app I’ve ever built, and at the risk of sounding cheesy - it still holds a special place in my heart. Even though it was never a significant moneymaker, I’ve kept it updated throughout the years. And I’m happy to say that it has attained over 95.000 downloads to date. If you enjoy using the app, please consider buying the full version. Thank you. - Lukas Petr, author of Quadratic Master

About

functionCalculator

This app calculates the value of mathematical functions y = f(x) for various types of numbers, including irrational ones. It displays results as exact fractions with square roots and can convert them to decimals. The app also supports calculations involving two different input values, alpha and beta.

Highlights
  • Calculate function values for any number type
  • Display results as exact fractions
  • Convert results to decimal
  • Perform operations on two input values
  • Supports irrational numbers
Features
Read full description

Calculate the value of the mathematical function y = f (x). It is possible to assign to x any integer, rational number, irrational number. For example, you can assign square root 2 to x. It is not necessary to fix it to decimal. The calculation result is output in the form of a fraction using square root. It is exactly the same as math calculations. You can also convert the result to decimal. Calculate the values ​​of f (α) and f (β) for two kinds of values, x = α and x = β, and f (α) + f (β), f (α) - f ), F (α) * f (β), f (α) / f (β) can also be calculated.

Screenshots

Quadratic Master4 screens
functionCalculator2 screens

Verdict

The call

The clearest difference is in-app purchases: functionCalculator at none against Quadratic Master's 1. functionCalculator also leads on iOS requirement (10.3 vs 16.0). Quadratic Master's advantage is ads (none vs shown) and ratings volume (333 vs 6). 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. Quadratic Master sells 1 one-off in-app purchase. functionCalculator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Quadratic Master holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Quadratic Master has 333 ratings behind it against 6, so its average is the more settled of the two.

UpkeepUpdate frequency

Quadratic Master ships an update every 5 months, functionCalculator every 11 months. The most recent releases landed on October 15, 2026 and October 11, 2026 respectively.

Scorecard7 real differences · 3 level
Quadratic Master versus functionCalculator: the parameters behind the verdict, then further details
ParameterQuadratic MasterfunctionCalculator
PriceFreeFree
Rating4.6 (333 ratings) — better4.3 (6 ratings)
Positive reviews73.5% of reviews—
Number of ratings333 — better6
Update frequencyEvery 5 months — betterEvery 11 months
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhoneiPhone, iPod — better
Requires iOS16.010.3 — better
Further details — not scored
Size4 MB6 MB
Age rating4+4+
DeveloperLukas PetrJirou Fukuda

Customer experience

Quadratic Master

All ratings333 ratings
Positive89.2%
Neutral5.1%
Negative5.7%
Written reviews34 reviews
Positive73.5%
Neutral5.9%
Negative20.6%

functionCalculator

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%

Bugs and requests

Quadratic Master

Reported bugs

10 issues
  • Input keypad incomplete after iOS update
  • App not working/unusable
  • Cannot enter problems
  • Not showing in app library
  • Cannot change addition to subtraction
Show 5 more
  • Flipped positive and negative of a specific factor
  • App crashes when trying to open
  • Wouldn't let me open the app
  • Pictures are just for show
  • Does not graph quadratic functions

Requested features

3 requests
  • Ability to use large decimals/scientific notation
  • Cooler icon
  • Change standard formula to vertex form

functionCalculator

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Quadratic Master

One-time1
  • Full version$3.99
None

functionCalculator

No in-app purchases

Questions

Is Quadratic Master free?
Quadratic Master is free to download, with in-app purchases available.
Is functionCalculator free?
functionCalculator is free to download, with no in-app purchases.
Which has better reviews, Quadratic Master or functionCalculator?
Quadratic Master is rated higher. Quadratic Master averages 4.6 out of 5 from 333 ratings, while functionCalculator averages 4.3 from 6 ratings.
Do Quadratic Master or functionCalculator have ads?
functionCalculator shows ads; Quadratic Master does not.
Which is updated more often, Quadratic Master or functionCalculator?
Quadratic Master ships an update every 5 months, and functionCalculator every 11 months. Most recently, Quadratic Master was updated on October 15, 2026 and functionCalculator on October 11, 2026.

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