# ローマ字チャレンジ vs QB説明　５年　体積

The clearest difference is in-app purchases: QB説明　５年　体積 at none against ローマ字チャレンジ's 4. QB説明　５年　体積 also leads on iOS requirement (11.0 vs 15.0). ローマ字チャレンジ's advantage is update cadence (every 5 months vs every 32 months) and review sentiment (62% vs 50%). On ads there is nothing between them.

ローマ字チャレンジ costs $2.99 and QB説明　５年　体積 $4.99 up front. ローマ字チャレンジ sells 4 one-off in-app purchases. QB説明　５年　体積 asks for nothing beyond the download.

ローマ字チャレンジ ships an update every 5 months, QB説明　５年　体積 every 32 months. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | ローマ字チャレンジ | QB説明　５年　体積 |
| --- | --- | --- |
| Price | **$2.99** | $4.99 |
| Positive reviews | **61.5% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 32 months |
| Monetization | — | Paid |
| Size | 78 MB | 8 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gloding Inc.](https://appshunter.io/developer/780228385) | [Suzuki Educational Software Co.,Ltd.](https://appshunter.io/developer/585512975) |

## What reviewers say

### ローマ字チャレンジ

[App page](https://appshunter.io/ios/app/id500133123)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| グルメチャレンジ | $0.99 | one-time |
| のりものチャレンジチャレンジ | $0.99 | one-time |
| フルーツチャレンジ | $0.99 | one-time |
| こんちゅうチャレンジ | $0.99 | one-time |


### 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 ローマ字チャレンジ free?

ローマ字チャレンジ costs $2.99, and also offers 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 ローマ字チャレンジ or QB説明　５年　体積 have ads?

Neither ローマ字チャレンジ nor QB説明　５年　体積 shows ads.

### Which is updated more often, ローマ字チャレンジ or QB説明　５年　体積?

ローマ字チャレンジ ships an update every 5 months, and QB説明　５年　体積 every 32 months. Most recently, ローマ字チャレンジ was updated on October 30, 2026 and QB説明　５年　体積 on October 29, 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.*