# 歴史総合・日本史探究｜アシストシステム vs 日本城郭検定2級 過去問・暗記アプリ

The clearest difference is update cadence: 歴史総合・日本史探究｜アシストシステム at every 9 days against 日本城郭検定2級 過去問・暗記アプリ's every 3 weeks. 歴史総合・日本史探究｜アシストシステム also leads on iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 歴史総合・日本史探究｜アシストシステム sells 1 one-off in-app purchase and 日本城郭検定2級 過去問・暗記アプリ sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

歴史総合・日本史探究｜アシストシステム ships an update every 9 days, 日本城郭検定2級 過去問・暗記アプリ every 3 weeks. The most recent releases landed on September 19, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | 歴史総合・日本史探究｜アシストシステム | 日本城郭検定2級 過去問・暗記アプリ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 9 days** | Every 3 weeks |
| Size | 93 MB | 42 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tsuyoshi Hayakawa](https://appshunter.io/developer/314516929) | [Hajime App Lab](https://appshunter.io/developer/1704838092) |

## What reviewers say

### 歴史総合・日本史探究｜アシストシステム

[App page](https://appshunter.io/ios/app/id6504427231)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 日本史探究追加データ | $2.99 | one-time |


### 日本城郭検定2級 過去問・暗記アプリ

[App page](https://appshunter.io/ios/app/2/id6784968471)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告削除 | $3.99 | one-time |
| 全問題解放 | $3.99 | one-time |
| 広告削除+全問題解放 | $5.99 | one-time |


## Frequently asked questions

### Is 歴史総合・日本史探究｜アシストシステム free?

歴史総合・日本史探究｜アシストシステム is free to download, with in-app purchases available.

### Is 日本城郭検定2級 過去問・暗記アプリ free?

日本城郭検定2級 過去問・暗記アプリ is free to download, with in-app purchases available.

### Do 歴史総合・日本史探究｜アシストシステム or 日本城郭検定2級 過去問・暗記アプリ have ads?

Both 歴史総合・日本史探究｜アシストシステム and 日本城郭検定2級 過去問・暗記アプリ show ads.

### Which is updated more often, 歴史総合・日本史探究｜アシストシステム or 日本城郭検定2級 過去問・暗記アプリ?

歴史総合・日本史探究｜アシストシステム ships an update every 9 days, and 日本城郭検定2級 過去問・暗記アプリ every 3 weeks. Most recently, 歴史総合・日本史探究｜アシストシステム was updated on September 19, 2026 and 日本城郭検定2級 過去問・暗記アプリ on September 10, 2026.

---

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