# Brain vs Puchi Bubble

The clearest difference is in-app purchases: Puchi Bubble at none against Brain's 8. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Brain sells 8 one-off in-app purchases. Puchi Bubble asks for nothing beyond the download.

Brain ships an update every 8 days, Puchi Bubble every 2 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | Brain | Puchi Bubble |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 2 weeks |
| Size | 163 MB | 30 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sungkyu Gil](https://appshunter.io/developer/1875909091) | [INGYU EUM](https://appshunter.io/developer/1886925606) |

## What reviewers say

### Brain

[App page](https://appshunter.io/ios/app/brain-rush/id6758946157)

**Features:** Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 연필 5자루 | $0.49 | one-time |
| 연습노트 10개 | $0.49 | one-time |
| 연필 20개 | $0.99 | one-time |
| 연필 20자루 | $1.99 | one-time |
| 광고 제거 | $1.99 | one-time |
| 닉네임 변경권 | $2.99 | one-time |
| 연습노트 100개 | $5.99 | one-time |
| 연필 100자루 | $9.99 | one-time |


### Puchi Bubble

[App page](https://appshunter.io/ios/app/puchi-bubble/id6772180625)

**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 Puchi Bubble free?

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

### Do Brain or Puchi Bubble have ads?

Neither Brain nor Puchi Bubble shows ads.

### Which is updated more often, Brain or Puchi Bubble?

Brain ships an update every 8 days, and Puchi Bubble every 2 weeks. Most recently, Brain was updated on October 25, 2026 and Puchi Bubble on October 25, 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.*