# Derson DSynth Mobile vs K.O. II

Derson DSynth Mobile and K.O. II 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 | Derson DSynth Mobile | K.O. II |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Size | 6 MB | 1 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [DERSON PRODUCTIONS, LLC](https://appshunter.io/developer/1707114233) | [海洋 符](https://appshunter.io/developer/1763768138) |

## What reviewers say

### Derson DSynth Mobile

[App page](https://appshunter.io/ios/app/derson-dsynth-mobile/id6778253991)

**Features:** macOS Compatibility

**In-app purchases:** none


### K.O. II

[App page](https://appshunter.io/ios/app/ko-ii/id6781550924)

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

**In-app purchases:** none


## Frequently asked questions

### Is Derson DSynth Mobile free?

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

### Is K.O. II free?

K.O. II is free to download, with no in-app purchases.

### Do Derson DSynth Mobile or K.O. II have ads?

Neither Derson DSynth Mobile nor K.O. II 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.*