Comparison

Quadratic Master vs PSIS

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

PSIS

Features
Read full description

PSIS-BKK brings many features to the classroom : • Class schedule • Digital Lessons and Materials • Attendance and Performance Tracking For the student: • Notification on upcoming academic activities • Submit assignment • Easy communication between the student and the lecturer outside the classroom • More features coming soon For Parents: • Notification when students are checked in • Track students' homework and assignments • View Tuition Fee • Make a payment via mobile banking

Screenshots

Quadratic Master4 screens
PSIS3 screens

Verdict

The call

The clearest difference is in-app purchases: PSIS at none against Quadratic Master's 1. PSIS also leads on device support (3 vs 1). On price, ads and iOS requirement 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. PSIS asks for nothing beyond the download.

Scorecard2 real differences · 8 level
Quadratic Master versus PSIS: the parameters behind the verdict, then further details
ParameterQuadratic MasterPSIS
PriceFreeFree
Rating4.6 (333 ratings) — better—
Positive reviews73.5% of reviews—
Number of ratings333 — better—
Update frequencyEvery 5 months—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.015.1 — better
Further details — not scored
Size4 MB77 MB
Age rating4+4+
DeveloperLukas PetrPaññāsāstra University of Cambodia

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

PSIS

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Quadratic Master

One-time1
  • Full version$3.99
None

PSIS

No in-app purchases

Questions

Is Quadratic Master free?
Quadratic Master is free to download, with in-app purchases available.
Is PSIS free?
PSIS is free to download, with no in-app purchases.
Do Quadratic Master or PSIS have ads?
Neither Quadratic Master nor PSIS shows ads.

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