# AIStudyJunior vs アチーブ

The clearest difference is in-app purchases: AIStudyJunior at none against アチーブ's 2. アチーブ's advantage is update cadence (every 8 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. アチーブ sells 2 in-app purchases, starting at $2.99 per month. AIStudyJunior asks for nothing beyond the download.

AIStudyJunior ships an update every 2 weeks, アチーブ every 8 days. The most recent releases landed on October 25, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | AIStudyJunior | アチーブ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 8 days** |
| Size | 43 MB | 48 MB |
| Requires iOS | 15.1 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takuma Yoshimura](https://appshunter.io/developer/1838295233) | [Katsuhiro Inamura](https://appshunter.io/developer/6786097976) |

## What reviewers say

### AIStudyJunior

[App page](https://appshunter.io/ios/app/aistudyjunior/id6754910385)

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

**In-app purchases:** none


### アチーブ

[App page](https://appshunter.io/ios/app/id6787655441)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| アチーブ プレミアム（月額） | $2.99 | per month |
| アチーブ プレミアム（年額） | $22.99 | per year |


## Frequently asked questions

### Is AIStudyJunior free?

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

### Is アチーブ free?

アチーブ is free to download, with in-app purchases available.

### Do AIStudyJunior or アチーブ have ads?

Neither AIStudyJunior nor アチーブ shows ads.

### Which is updated more often, AIStudyJunior or アチーブ?

AIStudyJunior ships an update every 2 weeks, and アチーブ every 8 days. Most recently, AIStudyJunior was updated on October 25, 2026 and アチーブ on October 20, 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.*