Comparison

Quadratic Master vs Linear Equations Calculator

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

Linear Equations Calculator

This educational app solves linear equations with detailed step-by-step solutions and visual plots. It supports various input methods, including points and slopes, and saves all calculations in a history log for easy access and sharing.

Highlights
  • Step-by-step linear equation solving
  • Graphical plotting of results
  • Calculation history log
  • Supports various input methods (points, slope)
  • Decimal and fraction input support
  • Solution sharing functionality
Features
Read full description

Get your homework done instantly. Prepare for exams without stress. Free, complete step-by-step solutions. Enter your values and compute linear equations from slope, intercept, or two points – including graphical visualization. HOW IT WORKS Enter your values in the appropriate fields and get started. You’ll receive the solution instantly and can share it with friends or classmates. YOUR PERSONAL DATA We don’t need it. Only anonymized data is collected, for example: - which features are used - how many solutions are generated This helps us improve. No conclusions can be drawn about you. COSTS Everything is free to use. 24/7 access to your solutions. All solution steps are always fully shown. If you need many solutions in a short time, various purchase options are available. EXTRAS - Overview of input options - Curated learning videos - Feedback for incorrect inputs - Manage your own solutions - Introduction to the app CONTACT Questions and feedback via Discord or directly in the app review.

Screenshots

Quadratic Master4 screens
Linear Equations Calculator4 screens

Verdict

The call

The clearest difference is rating: Quadratic Master at 4.6 against Linear Equations Calculator's 4.1. Quadratic Master also leads on ratings volume (333 vs 28). Linear Equations Calculator's advantage is update cadence (every 3 weeks vs every 5 months) and device support (3 vs 1). On price, review sentiment, ads and in-app purchases 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 and Linear Equations Calculator sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Quadratic Master holds the better App Store score, 4.6 against 4.1. That said, the two scores are not equally well evidenced: Quadratic Master has 333 ratings behind it against 28, so its average is the more settled of the two. Written reviews complicate that: 74% of Quadratic Master's written reviews are positive against 75% of Linear Equations Calculator's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Quadratic Master ships an update every 5 months, Linear Equations Calculator every 3 weeks. The most recent releases landed on September 20, 2026 and September 14, 2026 respectively.

Scorecard4 real differences · 6 level
Quadratic Master versus Linear Equations Calculator: the parameters behind the verdict, then further details
ParameterQuadratic MasterLinear Equations Calculator
PriceFreeFree
Rating4.6 (333 ratings) — better4.1 (28 ratings)
Positive reviews73.5% of reviews75.0% of reviews — better
Number of ratings333 — better28
Update frequencyEvery 5 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size4 MB179 MB
Age rating4+4+
DeveloperLukas PetrGlindemann, Sennoun, Langer GbR

Customer experience

Quadratic Master

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

Linear Equations Calculator

All ratings28 ratings
Positive78.6%
Neutral0.0%
Negative21.4%
Written reviews16 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

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

Linear Equations Calculator

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Quadratic Master

One-time1
  • Full version$3.99
8 purchases

Linear Equations Calculator

One-time8
  • +30 User Tokens$0.29
  • +1 Convenience Token / 6h, max. +2$0.59
  • +2 Convenience Tokens / 6h, max. +4$0.99
Show 5 more
  • +150 User Tokens$0.99
  • +300 User Tokens$1.49
  • +4 Convenience Tokens / 6h, max. +8$1.59
  • Remove Ads$1.99
  • Lifetime Access$1.99

Questions

Is Quadratic Master free?
Quadratic Master is free to download, with in-app purchases available.
Is Linear Equations Calculator free?
Linear Equations Calculator is free to download, with in-app purchases available.
Which has better reviews, Quadratic Master or Linear Equations Calculator?
Quadratic Master is rated higher. Quadratic Master averages 4.6 out of 5 from 333 ratings, while Linear Equations Calculator averages 4.1 from 28 ratings.
Do Quadratic Master or Linear Equations Calculator have ads?
Neither Quadratic Master nor Linear Equations Calculator shows ads.
Which is updated more often, Quadratic Master or Linear Equations Calculator?
Quadratic Master ships an update every 5 months, and Linear Equations Calculator every 3 weeks. Most recently, Quadratic Master was updated on September 20, 2026 and Linear Equations Calculator on September 14, 2026.

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