# World Atomic Week vs ERKO

World Atomic Week and ERKO are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | World Atomic Week | ERKO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | — |
| Size | 75 MB | 45 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CampuZ OOO](https://appshunter.io/developer/1358580331) | [Rinat Sultanov](https://appshunter.io/developer/1454203768) |

## What reviewers say

### World Atomic Week

[App page](https://appshunter.io/ios/app/world-atomic-week/id6444339662)

**In-app purchases:** none


### ERKO

[App page](https://appshunter.io/ios/app/erko/id6476834981)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is World Atomic Week free?

World Atomic Week is free to download, with no in-app purchases.

### Is ERKO free?

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

### Do World Atomic Week or ERKO have ads?

Neither World Atomic Week nor ERKO shows ads.

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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.*