# Psychology vs MindStack

The clearest difference is ads: Psychology at none against MindStack's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Psychology sells 1 one-off in-app purchase and MindStack sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Psychology ships an update every 10 days, MindStack fortnightly. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Psychology | MindStack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 10 days** | Fortnightly |
| Size | 222 MB | 27 MB |
| Requires iOS | **13.6** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Man Hung Sun](https://appshunter.io/developer/1471605573) | [DMITRIY IVANOV](https://appshunter.io/developer/1229890011) |

## What reviewers say

### Psychology

[App page](https://appshunter.io/ios/app/psychology-happy-little-thing/id1568998682)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| upgrade | $0.99 | one-time |


### MindStack

[App page](https://appshunter.io/ios/app/mindstack-pass-coding-screen/id6754540526)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NORA Sync – 1W | $2.99 | per 7 days |
| NORA Sync – 1M | $8.99 | per month |
| NORA Sync – 1W | $19.99 | per 3 months |


## Frequently asked questions

### Is Psychology free?

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

### Is MindStack free?

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

### Do Psychology or MindStack have ads?

MindStack shows ads; Psychology does not.

### Which is updated more often, Psychology or MindStack?

Psychology ships an update every 10 days, and MindStack fortnightly. Most recently, Psychology was updated on November 7, 2026 and MindStack on October 30, 2026.

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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.*