# わかる！算数 小学４年【上】 vs QB説明　５年　体積

The clearest difference is price: QB説明　５年　体積 at $4.99 against わかる！算数 小学４年【上】's $9.99. QB説明　５年　体積 also leads on iOS requirement (11.0 vs 15.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

わかる！算数 小学４年【上】 costs $9.99 and QB説明　５年　体積 $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

わかる！算数 小学４年【上】 ships an update every 37 months, QB説明　５年　体積 every 32 months. The most recent releases landed on September 10, 2026 and August 22, 2026 respectively.

## The numbers

| Metric | わかる！算数 小学４年【上】 | QB説明　５年　体積 |
| --- | --- | --- |
| Price | $9.99 | **$4.99** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 37 months | **Every 32 months** |
| Monetization | — | Paid |
| Size | 50 MB | 8 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [がくげい](https://appshunter.io/developer/415230275) | [Suzuki Educational Software Co.,Ltd.](https://appshunter.io/developer/585512975) |

## What reviewers say

### わかる！算数 小学４年【上】

[App page](https://appshunter.io/ios/app/id897322501)

**In-app purchases:** none


### 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


## Frequently asked questions

### Is わかる！算数 小学４年【上】 free?

わかる！算数 小学４年【上】 costs $9.99, with no in-app purchases.

### Is QB説明　５年　体積 free?

QB説明　５年　体積 costs $4.99, with no in-app purchases.

### Do わかる！算数 小学４年【上】 or QB説明　５年　体積 have ads?

Neither わかる！算数 小学４年【上】 nor QB説明　５年　体積 shows ads.

### Which is updated more often, わかる！算数 小学４年【上】 or QB説明　５年　体積?

わかる！算数 小学４年【上】 ships an update every 37 months, and QB説明　５年　体積 every 32 months. Most recently, わかる！算数 小学４年【上】 was updated on September 10, 2026 and QB説明　５年　体積 on August 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*