# KSOB vs DRK.Chat

The clearest difference is update cadence: KSOB at fortnightly against DRK.Chat's every 16 months. DRK.Chat's advantage is iOS requirement (15.1 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.

KSOB ships an update fortnightly, DRK.Chat every 16 months. The most recent releases landed on September 24, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | KSOB | DRK.Chat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 16 months |
| Size | 84 MB | 59 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Kliniken Südostbayern AG](https://appshunter.io/developer/1504265295) | [Deutsches Rotes Kreuz Medizinische Dienste Mainz-Bingen gGmbH](https://appshunter.io/developer/1647733828) |

## What reviewers say

### KSOB

[App page](https://appshunter.io/ios/app/ksob-app/id1504265296)

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

**In-app purchases:** none


### DRK.Chat

[App page](https://appshunter.io/ios/app/drkchat/id1591625738)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KSOB free?

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

### Is DRK.Chat free?

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

### Do KSOB or DRK.Chat have ads?

Neither KSOB nor DRK.Chat shows ads.

### Which is updated more often, KSOB or DRK.Chat?

KSOB ships an update fortnightly, and DRK.Chat every 16 months. Most recently, KSOB was updated on September 24, 2026 and DRK.Chat on September 10, 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.*