# Mess vs Concentrate! IQ Trainer

The clearest difference is ads: Concentrate! IQ Trainer at none against Mess's shown. On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

## The numbers

| Metric | Mess | Concentrate! IQ Trainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | — | Monthly |
| Size | 66 MB | 31 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Natalia Tsybulenka](https://appshunter.io/developer/901382548) | [christoph joshua BOLL](https://appshunter.io/developer/1631352653) |

## What reviewers say

### Mess

[App page](https://appshunter.io/ios/app/mess-concentration-game/id1591749951)

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

**In-app purchases:** none


### Concentrate! IQ Trainer

[App page](https://appshunter.io/ios/app/concentrate-iq-trainer/id6738403503)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mess free?

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

### Is Concentrate! IQ Trainer free?

Concentrate! IQ Trainer is free to download, with no in-app purchases.

### Do Mess or Concentrate! IQ Trainer have ads?

Mess shows ads; Concentrate! IQ Trainer does not.

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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.*