# brain vs Happy Diamond Sort

The clearest difference is in-app purchases: Happy Diamond Sort at none against brain's 4. brain's advantage is ads (none vs shown). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. brain sells 4 one-off in-app purchases. Happy Diamond Sort asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for brain against 5.0 for Happy Diamond Sort. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

brain ships an update fortnightly, Happy Diamond Sort every 10 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | brain | Happy Diamond Sort |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/brain-inator/id6752616586/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/happy-diamond-sort/id6781168120/reviews) |
| Number of ratings | 2 | 2 |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 158 MB | 140 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 9+ | 4+ |
| Developer | [2Shea Productions LLC](https://appshunter.io/developer/1828730060) | [Changsha keyboard Xia network co.,ltd](https://appshunter.io/developer/1728974908) |

## What reviewers say

### brain

[App page](https://appshunter.io/ios/app/brain-inator/id6752616586)

Test your knowledge with a fun quiz game designed for those who enjoy a mental challenge. It's perfect for anyone looking to sharpen their intellect or prove their smarts.

**Highlights:** Quiz game format, Knowledge testing, Brain training, Suitable for all ages, Engaging gameplay

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coins 400C | $1.99 | one-time |
| Coins 1000C | $2.99 | one-time |
| Coins 2000C | $4.99 | one-time |
| Coins 10000C | $19.99 | one-time |


### Happy Diamond Sort

[App page](https://appshunter.io/ios/app/happy-diamond-sort/id6781168120)

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

**In-app purchases:** none


## Frequently asked questions

### Is brain free?

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

### Is Happy Diamond Sort free?

Happy Diamond Sort is free to download, with no in-app purchases.

### Which has better reviews, brain or Happy Diamond Sort?

brain and Happy Diamond Sort are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do brain or Happy Diamond Sort have ads?

Happy Diamond Sort shows ads; brain does not.

### Which is updated more often, brain or Happy Diamond Sort?

brain ships an update fortnightly, and Happy Diamond Sort every 10 days. Most recently, brain was updated on October 24, 2026 and Happy Diamond Sort on October 24, 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.*