# Challenge 4 Change vs Strahlkraft Studios

Challenge 4 Change and Strahlkraft Studios are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases 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.

Challenge 4 Change ships an update every 3 months, Strahlkraft Studios every 6 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Challenge 4 Change | Strahlkraft Studios |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Size | 213 MB | 11 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Challenge 4 Change GmbH](https://appshunter.io/developer/1593236451) | [Strahlkraft Studios](https://appshunter.io/developer/1791532048) |

## What reviewers say

### Challenge 4 Change

[App page](https://appshunter.io/ios/app/challenge-4-change/id1593236449)

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

**In-app purchases:** none


### Strahlkraft Studios

[App page](https://appshunter.io/ios/app/strahlkraft-studios/id6740772216)

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

**In-app purchases:** none


## Frequently asked questions

### Is Challenge 4 Change free?

Challenge 4 Change is free to download, with no in-app purchases.

### Is Strahlkraft Studios free?

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

### Do Challenge 4 Change or Strahlkraft Studios have ads?

Neither Challenge 4 Change nor Strahlkraft Studios shows ads.

### Which is updated more often, Challenge 4 Change or Strahlkraft Studios?

Challenge 4 Change ships an update every 3 months, and Strahlkraft Studios every 6 weeks. Most recently, Challenge 4 Change was updated on October 27, 2026 and Strahlkraft Studios on October 25, 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.*