Four Colours vs Matrix
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Four Colours
Explore the mathematical concept of the four-color theorem with interactive maps of various countries and regions. This educational app allows you to test and understand how any map can be colored using only four colors, ensuring no adjacent areas share the same hue.
- Four-color theorem demonstration
- Interactive maps of 12 countries/regions
- Geography study tool
- Computer-aided science verification
- Educational exploration
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Could be a map of USA or your country colored using four colors in such a way that Nebraska and Missouri (as well as any two contiguous regions or states) wouldn’t be filled with one color? It turns out that you can manage to do it with any map. And this seems to be the first statement in science proved with computer aid. You can verify this statement for variety of maps, study up geography and visit Martin Gardner country by the way. Maps in this release: • Commonwealth of Australia, • Republic of Austria, • French Republic, • Federal Republic of Germany, • United Mexican States, • Republic of Poland, • Portuguese Republic, • Kingdom of Spain, • Kingdom of Sweden, • Swiss Confederation, • United States of America, • United Kingdom of Great Britain and Northern Ireland.
Matrix
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The MatrixAnalysis is carefully designed to be a simple and elegant app. This app has tools to help you analyze matrices like finding eigenvalues and eigenvectors, diagonalization, QR, SLU, LU factorization. This app can also be used to do matrix operations like, finding inverse, determinant, dot product, cross product, and much more. You can also do elementwise operations and scalar operations. Want to do fast fourier transform (FFT) or inverse fourier transform (IFFT), this app is capable of IFFT Want to find an pseudo inverse of a non-square matrix, this app has you covered Want to know a rotation matrix for a given angle or rotate a vector by the given angle? This app has you covered. The expressions and the solutions are displayed in beautiful mathematical way. Once the expressions are solved, a beautifully written solutions are created that you can share with other or save it locally. It automatically saves your hard work locally on your device so you can come back and pick up from where you left off as your great effort will not be lost. There is also a Study page to help you with learning some important matrix vector formulas and some useful technique. This is an app for all student groups. From high school to college to university students. Be creative. Enjoy the app!
Screenshots
Verdict
The clearest difference is price: Matrix at Free against Four Colours's $1.99. Matrix also leads on update cadence (every 5 weeks vs every 42 months). Four Colours's advantage is ads (none vs shown) and iOS requirement (12.0 vs 15.1). On in-app purchases 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
Matrix is free to download; Four Colours costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Four Colours ships an update every 42 months, Matrix every 5 weeks. The most recent releases landed on October 8, 2026 and October 27, 2026 respectively.
| Parameter | Four Colours | Matrix |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 42 months | Every 5 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 15 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | Roman Koksharov | Om Prakash Chapagain |
In-app purchases
Four Colours
No in-app purchases
Matrix
No in-app purchases
Questions
Is Four Colours free?
Is Matrix free?
Do Four Colours or Matrix have ads?
Which is updated more often, Four Colours or Matrix?
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