# KJF Chemnitz vs Colditz.app

The clearest difference is update cadence: Colditz.app at every 4 days against KJF Chemnitz's fortnightly. Colditz.app also leads on iOS requirement (15.6 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

KJF Chemnitz ships an update fortnightly, Colditz.app every 4 days. The most recent releases landed on October 2, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | KJF Chemnitz | Colditz.app |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Size | 83 MB | 75 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Kinder-, Jugend und Familienhilfe Chemnitz e.V](https://appshunter.io/developer/1684702591) | [Mirko Fischer](https://appshunter.io/developer/1548987261) |

## What reviewers say

### KJF Chemnitz

[App page](https://appshunter.io/ios/app/kjf-chemnitz/id6448448173)

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

**In-app purchases:** none


### Colditz.app

[App page](https://appshunter.io/ios/app/colditzapp/id6761426441)

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

**In-app purchases:** none


## Frequently asked questions

### Is KJF Chemnitz free?

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

### Is Colditz.app free?

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

### Do KJF Chemnitz or Colditz.app have ads?

Neither KJF Chemnitz nor Colditz.app shows ads.

### Which is updated more often, KJF Chemnitz or Colditz.app?

KJF Chemnitz ships an update fortnightly, and Colditz.app every 4 days. Most recently, KJF Chemnitz was updated on October 2, 2026 and Colditz.app on September 30, 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.*