# DISC vs Mental Models

The clearest difference is in-app purchases: DISC at none against Mental Models's 1. DISC also leads on iOS requirement (11.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Mental Models sells 1 one-off in-app purchase. DISC asks for nothing beyond the download.

## The numbers

| Metric | DISC | Mental Models |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Size | 1.1 GB | 53 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Tools4success s.l.](https://appshunter.io/developer/1455197741) | [Christos Tsavas](https://appshunter.io/developer/1887557969) |

## What reviewers say

### DISC

[App page](https://appshunter.io/ios/app/disc-up-maybe-down/id6575367020)

**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 DISC free?

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

### Is Mental Models free?

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

### Do DISC or Mental Models have ads?

Neither DISC 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.*