Four Colours vs Learn Shell Scripting Pro
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.
Learn Shell Scripting Pro
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Learn Shell Scripting and Bash programming with our comprehensive tutorial app. Perfect for beginners starting their scripting journey and professionals automating their workflows. Available in 6 Languages: • English, French, German, Portuguese, Russian, and Spanish - study in your native language! What You'll Learn: • Shell scripting fundamentals and command line basics • Variables, loops, and conditional statements • Functions and script organization • File manipulation and text processing • System automation and task scheduling • Advanced scripting techniques and best practices Complete Learning Experience: • 25+ structured chapters from beginner to advanced • Step-by-step tutorials with practical examples • Real-world scripting scenarios • 250+ interactive quiz questions User-Friendly Features: • Dark and light theme options • Offline learning - no internet required • Search functionality across all content • Bookmark important topics (favorites) • Clean, distraction-free interface • Built-in script examples and templates Perfect for: • Complete beginners with no scripting experience • System administrators automating tasks • Developers working in Unix/Linux environments • Students preparing for technical certifications • IT professionals improving efficiency • DevOps engineers building automation scripts Start your shell scripting mastery journey today - from basic commands to advanced automation scripts!
Screenshots
Verdict
The clearest difference is update cadence: Learn Shell Scripting Pro at every 3 months against Four Colours's every 42 months. Four Colours's advantage is price ($1.99 vs $4.99) and iOS requirement (12.0 vs 16.0). 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 Learn Shell Scripting Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Four Colours ships an update every 42 months, Learn Shell Scripting Pro every 3 months. The most recent releases landed on October 8, 2026 and October 1, 2026 respectively.
| Parameter | Four Colours | Learn Shell Scripting Pro |
|---|---|---|
| Price | $1.99 — better | $4.99 |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 42 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 12.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 15 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Roman Koksharov | ALG Software Lab |
In-app purchases
Four Colours
No in-app purchases
Learn Shell Scripting Pro
No in-app purchases
Questions
Is Four Colours free?
Is Learn Shell Scripting Pro free?
Do Four Colours or Learn Shell Scripting Pro have ads?
Which is updated more often, Four Colours or Learn Shell Scripting Pro?
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