# 参考書de英語脳 vs 世界史 一問一答 共通テスト対策 全問解説

The clearest difference is iOS requirement: 参考書de英語脳 at 13.6 against 世界史 一問一答 共通テスト対策 全問解説's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 参考書de英語脳 sells 4 one-off in-app purchases and 世界史 一問一答 共通テスト対策 全問解説 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

参考書de英語脳 ships an update every 3 weeks, 世界史 一問一答 共通テスト対策 全問解説 monthly. The most recent releases landed on October 19, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | 参考書de英語脳 | 世界史 一問一答 共通テスト対策 全問解説 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Size | 27 MB | 25 MB |
| Requires iOS | **13.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Seiji Mukai](https://appshunter.io/developer/1228461062) | [shinichi kinuwaki](https://appshunter.io/developer/1847823851) |

## What reviewers say

### 参考書de英語脳

[App page](https://appshunter.io/ios/app/de/id1228461063)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 30日間利用権 | $0.99 | one-time |
| 90日間利用権 | $2.99 | one-time |
| 180日間利用権 | $5.99 | one-time |
| 365日間利用権 | $11.99 | one-time |


### 世界史 一問一答 共通テスト対策 全問解説

[App page](https://appshunter.io/ios/app/id6808352249)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| フルアンロック | $2.99 | one-time |


## Frequently asked questions

### Is 参考書de英語脳 free?

参考書de英語脳 is free to download, with in-app purchases available.

### Is 世界史 一問一答 共通テスト対策 全問解説 free?

世界史 一問一答 共通テスト対策 全問解説 is free to download, with in-app purchases available.

### Do 参考書de英語脳 or 世界史 一問一答 共通テスト対策 全問解説 have ads?

Neither 参考書de英語脳 nor 世界史 一問一答 共通テスト対策 全問解説 shows ads.

### Which is updated more often, 参考書de英語脳 or 世界史 一問一答 共通テスト対策 全問解説?

参考書de英語脳 ships an update every 3 weeks, and 世界史 一問一答 共通テスト対策 全問解説 monthly. Most recently, 参考書de英語脳 was updated on October 19, 2026 and 世界史 一問一答 共通テスト対策 全問解説 on October 12, 2026.

---

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