# Brain vs Attune Grappling

The clearest difference is in-app purchases: Brain at none against Attune Grappling's 3. Attune Grappling's advantage is update cadence (every 3 weeks vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Attune Grappling sells 3 in-app purchases, starting at $12.99 per month. Brain asks for nothing beyond the download.

Brain ships an update every 6 weeks, Attune Grappling every 3 weeks. The most recent releases landed on October 15, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Brain | Attune Grappling |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Size | 41 MB | 32 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kazuhiro Miyachi](https://appshunter.io/developer/1730505082) | [Paal-Steffen Nymann](https://appshunter.io/developer/1896591467) |

## What reviewers say

### Brain

[App page](https://appshunter.io/ios/app/brain-jiu-jitsu/id6477785304)

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

**In-app purchases:** none


### Attune Grappling

[App page](https://appshunter.io/ios/app/attune-grappling/id6768634032)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Explorer | $12.99 | per month |
| Practitioner | $34.99 | per month |
| Coach Access | $44.99 | per month |


## Frequently asked questions

### Is Brain free?

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

### Is Attune Grappling free?

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

### Do Brain or Attune Grappling have ads?

Neither Brain nor Attune Grappling shows ads.

### Which is updated more often, Brain or Attune Grappling?

Brain ships an update every 6 weeks, and Attune Grappling every 3 weeks. Most recently, Brain was updated on October 15, 2026 and Attune Grappling on October 11, 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.*