# QB説明　５年　体積 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　５年　体積's $4.99. 楽しい理科小４（ダンケ） also leads on update cadence (every 13 months vs every 32 months). QB説明　５年　体積's advantage is in-app purchases (none vs 1) and iOS requirement (11.0 vs 18.2). On 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　５年　体積 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　５年　体積 asks for nothing beyond the download.

QB説明　５年　体積 ships an update every 32 months, 楽しい理科小４（ダンケ） every 13 months. The most recent releases landed on October 6, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | QB説明　５年　体積 | 楽しい理科小４（ダンケ） |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 32 months | **Every 13 months** |
| Monetization | Paid | — |
| Size | 8 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　５年　体積

[App page](https://appshunter.io/ios/app/qb/id1461429270)

This app helps elementary school students understand volume calculations through interactive manipulation of 3D shapes on an iPad. It allows for self-discovery, peer explanation, and visualization of concepts like stacking, unfolding, and filling shapes.

**Highlights:** Interactive 3D shape manipulation, Visualize volume concepts, Practice calculating volume, Explain concepts to peers, Unfolding and cutting shapes, Learning modes: basic and advanced

**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　５年　体積 free?

QB説明　５年　体積 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　５年　体積 or 楽しい理科小４（ダンケ） have ads?

Neither QB説明　５年　体積 nor 楽しい理科小４（ダンケ） shows ads.

### Which is updated more often, QB説明　５年　体積 or 楽しい理科小４（ダンケ）?

QB説明　５年　体積 ships an update every 32 months, and 楽しい理科小４（ダンケ） every 13 months. Most recently, QB説明　５年　体積 was updated on October 6, 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.*