# KCM Mobile vs Derps

The clearest difference is update cadence: Derps at fortnightly against KCM Mobile's every 2 months. 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.

KCM Mobile ships an update every 2 months, Derps fortnightly. The most recent releases landed on September 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | KCM Mobile | Derps |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 53 MB | 43 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KCM Mobile](https://appshunter.io/developer/1837371228) | [DOLPHINPOS,LLC](https://appshunter.io/developer/1458756229) |

## What reviewers say

### KCM Mobile

[App page](https://appshunter.io/ios/app/kcm-mobile/id6754323876)

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

**In-app purchases:** none


### Derps

[App page](https://appshunter.io/ios/app/derps-mobile-app/id6805008135)

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

**In-app purchases:** none


## Frequently asked questions

### Is KCM Mobile free?

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

### Is Derps free?

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

### Do KCM Mobile or Derps have ads?

Neither KCM Mobile nor Derps shows ads.

### Which is updated more often, KCM Mobile or Derps?

KCM Mobile ships an update every 2 months, and Derps fortnightly. Most recently, KCM Mobile was updated on September 21, 2026 and Derps on October 24, 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.*