# Brain Infinity vs 咲耶のおてつだいチャレンジ

The clearest difference is in-app purchases: 咲耶のおてつだいチャレンジ at none against Brain Infinity's 1. 咲耶のおてつだいチャレンジ also leads on update cadence (every 2 days vs every 5 days) and iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Brain Infinity sells 1 one-off in-app purchase. 咲耶のおてつだいチャレンジ asks for nothing beyond the download.

Brain Infinity ships an update every 5 days, 咲耶のおてつだいチャレンジ every 2 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Brain Infinity | 咲耶のおてつだいチャレンジ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 2 days** |
| Size | 72 MB | 102 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [YUTA UEDA](https://appshunter.io/developer/1853129120) | [Nihon no Inaka ha Shihonshugi no Frontier da LLC.](https://appshunter.io/developer/796913059) |

## What reviewers say

### Brain Infinity

[App page](https://appshunter.io/ios/app/brain-infinity-mind-workout/id6755319401)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


### 咲耶のおてつだいチャレンジ

[App page](https://appshunter.io/ios/app/id6786641595)

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

**In-app purchases:** none


## Frequently asked questions

### Is Brain Infinity free?

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

### Is 咲耶のおてつだいチャレンジ free?

咲耶のおてつだいチャレンジ is free to download, with no in-app purchases.

### Do Brain Infinity or 咲耶のおてつだいチャレンジ have ads?

Neither Brain Infinity nor 咲耶のおてつだいチャレンジ shows ads.

### Which is updated more often, Brain Infinity or 咲耶のおてつだいチャレンジ?

Brain Infinity ships an update every 5 days, and 咲耶のおてつだいチャレンジ every 2 days. Most recently, Brain Infinity was updated on October 30, 2026 and 咲耶のおてつだいチャレンジ on October 31, 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.*