# QB説明　４年　面積 vs 楽しい理科小４（ダンケ）

The clearest difference is price: 楽しい理科小４（ダンケ） at Free against QB説明　４年　面積's $4.99. QB説明　４年　面積's advantage is in-app purchases (none vs 1) and iOS requirement (11.0 vs 18.2). On update cadence, ads and device support there is nothing between them.

楽しい理科小４（ダンケ） is free to download; QB説明　４年　面積 costs $4.99 up front. 楽しい理科小４（ダンケ） sells 1 one-off in-app purchase. QB説明　４年　面積 asks for nothing beyond the download.

QB説明　４年　面積 ships an update every 19 months, 楽しい理科小４（ダンケ） every 13 months. The most recent releases landed on September 25, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | QB説明　４年　面積 | 楽しい理科小４（ダンケ） |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 13 months** |
| Size | 9 MB | 24 MB |
| Requires iOS | **11.0** | 18.2 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Suzuki Educational Software Co.,Ltd.](https://appshunter.io/developer/585512975) | [Norio Takeda](https://appshunter.io/developer/1485221811) |

## What reviewers say

### QB説明　４年　面積

[App page](https://appshunter.io/ios/app/qb/id770302362)

**In-app purchases:** none


### 楽しい理科小４（ダンケ）

[App page](https://appshunter.io/ios/app/id1503349913)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ゴールドコイン | $7.99 | one-time |


## Frequently asked questions

### Is QB説明　４年　面積 free?

QB説明　４年　面積 costs $4.99, with no in-app purchases.

### Is 楽しい理科小４（ダンケ） free?

楽しい理科小４（ダンケ） is free to download, with in-app purchases available.

### Do QB説明　４年　面積 or 楽しい理科小４（ダンケ） have ads?

Neither QB説明　４年　面積 nor 楽しい理科小４（ダンケ） shows ads.

### Which is updated more often, QB説明　４年　面積 or 楽しい理科小４（ダンケ）?

QB説明　４年　面積 ships an update every 19 months, and 楽しい理科小４（ダンケ） every 13 months. Most recently, QB説明　４年　面積 was updated on September 25, 2026 and 楽しい理科小４（ダンケ） on October 4, 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.*