# Четыре краски vs IziSerb

The clearest difference is in-app purchases: Четыре краски at none against IziSerb's 2. Четыре краски also leads on iOS requirement (8.0 vs 15.0). IziSerb's advantage is update cadence (every 2 days vs every 59 months). On price, ads and device support there is nothing between them.

Both are free to download. IziSerb sells 2 in-app purchases, starting at $7.99 per month. Четыре краски asks for nothing beyond the download.

Четыре краски ships an update every 59 months, IziSerb every 2 days. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Четыре краски | IziSerb |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id644228154/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 92.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 59 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 11 MB | 26 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Roman Koksharov](https://appshunter.io/developer/700716922) | [Danil Ulyanov](https://appshunter.io/developer/6802025279) |

## What reviewers say

### Четыре краски

[App page](https://appshunter.io/ios/app/id644228154)

Explore the Four Color Theorem by coloring a map of Russia. Learn geography and discover the first computer-proven scientific statement. This app offers an interactive way to understand a complex mathematical concept.

**Highlights:** Interactive map coloring, Demonstrates Four Color Theorem, Geography learning, Historical math context, Country map exploration

**Features:** macOS Compatibility

**In-app purchases:** none


### IziSerb

[App page](https://appshunter.io/ios/app/iziserb/id6805337601)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Помесячно | $7.99 | per month |
| Годовая | $49.99 | per year |


## Frequently asked questions

### Is Четыре краски free?

Четыре краски is free to download, with no in-app purchases.

### Is IziSerb free?

IziSerb is free to download, with in-app purchases available.

### Do Четыре краски or IziSerb have ads?

Neither Четыре краски nor IziSerb shows ads.

### Which is updated more often, Четыре краски or IziSerb?

Четыре краски ships an update every 59 months, and IziSerb every 2 days. Most recently, Четыре краски was updated on October 8, 2026 and IziSerb on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*