# Cognitive Clarity vs Mental Models

The clearest difference is price: Mental Models at Free against Cognitive Clarity's $0.99. Cognitive Clarity's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 15.1). On ads and device support there is nothing between them.

Mental Models is free to download; Cognitive Clarity costs $0.99 up front. Mental Models sells 1 one-off in-app purchase. Cognitive Clarity asks for nothing beyond the download.

## The numbers

| Metric | Cognitive Clarity | Mental Models |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Size | 29 MB | 53 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Polemics Applications LLC](https://appshunter.io/developer/482504032) | [Christos Tsavas](https://appshunter.io/developer/1887557969) |

## What reviewers say

### Cognitive Clarity

[App page](https://appshunter.io/ios/app/cognitive-clarity/id6744105600)

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

**In-app purchases:** none


### Mental Models

[App page](https://appshunter.io/ios/app/mental-models-mind-models/id6761058477)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $6.99 | one-time |


## Frequently asked questions

### Is Cognitive Clarity free?

Cognitive Clarity costs $0.99, with no in-app purchases.

### Is Mental Models free?

Mental Models is free to download, with in-app purchases available.

### Do Cognitive Clarity or Mental Models have ads?

Neither Cognitive Clarity nor Mental Models 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.*