# 世界史年号問題 vs 二陸技対策

The clearest difference is price: 世界史年号問題 at Free against 二陸技対策's $4.99. 世界史年号問題 also leads on update cadence (every 3 weeks vs every 6 weeks). 二陸技対策's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

世界史年号問題 is free to download; 二陸技対策 costs $4.99 up front. 世界史年号問題 sells 1 one-off in-app purchase. 二陸技対策 asks for nothing beyond the download.

世界史年号問題 ships an update every 3 weeks, 二陸技対策 every 6 weeks. The most recent releases landed on October 30, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | 世界史年号問題 | 二陸技対策 |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/id6767581785/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 82.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Size | 15 MB | 34 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Akira Fujisawa](https://appshunter.io/developer/1533514621) | [satoshi yoshida](https://appshunter.io/developer/1873856165) |

## What reviewers say

### 世界史年号問題

[App page](https://appshunter.io/ios/app/id1591797286)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示 | $4.99 | one-time |


### 二陸技対策

[App page](https://appshunter.io/ios/app/id6767581785)

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

**In-app purchases:** none


## Frequently asked questions

### Is 世界史年号問題 free?

世界史年号問題 is free to download, with in-app purchases available.

### Is 二陸技対策 free?

二陸技対策 costs $4.99, with no in-app purchases.

### Do 世界史年号問題 or 二陸技対策 have ads?

世界史年号問題 shows ads; 二陸技対策 does not.

### Which is updated more often, 世界史年号問題 or 二陸技対策?

世界史年号問題 ships an update every 3 weeks, and 二陸技対策 every 6 weeks. Most recently, 世界史年号問題 was updated on October 30, 2026 and 二陸技対策 on October 15, 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.*