Four Colours vs COMath Premium
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.
COMath Premium
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COMath Premium makes it easy to practice math, solve word problems, learn algebra step by step, and enjoy number puzzles such as Sudoku, Calcudoku, and Fillomino. Premium includes full access, no ads, and no privacy tracking. New to COMath? Try the ad-supported COMath first to experience the same core features before choosing Premium.
Screenshots
Verdict
The clearest difference is update cadence: COMath Premium at every 2 weeks against Four Colours's every 42 months. COMath Premium also leads on price ($0.99 vs $1.99). Four Colours's advantage is iOS requirement (12.0 vs 15.0). On ads, 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
Four Colours costs $1.99 and COMath Premium $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Four Colours ships an update every 42 months, COMath Premium every 2 weeks. The most recent releases landed on October 8, 2026 and October 25, 2026 respectively.
| Parameter | Four Colours | COMath Premium |
|---|---|---|
| Price | $1.99 | $0.99 — better |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 42 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 15 MB | 85 MB |
| Age rating | 4+ | 4+ |
| Developer | Roman Koksharov | Jianfeng Wu |
In-app purchases
Four Colours
No in-app purchases
COMath Premium
No in-app purchases
Questions
Is Four Colours free?
Is COMath Premium free?
Do Four Colours or COMath Premium have ads?
Which is updated more often, Four Colours or COMath Premium?
Other comparisons
