# Mastermind Challenger vs Killdoku

The clearest difference is in-app purchases: Killdoku at none against Mastermind Challenger's 1. Killdoku also leads on iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Mastermind Challenger sells 1 one-off in-app purchase. Killdoku asks for nothing beyond the download.

## The numbers

| Metric | Mastermind Challenger | Killdoku |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 5 weeks |
| Size | 2 MB | 188 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Philippe GUILLAUD](https://appshunter.io/developer/378564341) | [Ted Maertzdorf](https://appshunter.io/developer/6800499130) |

## What reviewers say

### Mastermind Challenger

[App page](https://appshunter.io/ios/app/mastermind-challenger/id1467328443)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Levels | $1.99 | one-time |


### Killdoku

[App page](https://appshunter.io/ios/app/killdoku/id6800499128)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Mastermind Challenger free?

Mastermind Challenger is free to download, with in-app purchases available.

### Is Killdoku free?

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

### Do Mastermind Challenger or Killdoku have ads?

Neither Mastermind Challenger nor Killdoku 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.*