# 東大王からの挑戦状 vs 年号デュエル

The clearest difference is in-app purchases: 東大王からの挑戦状 at none against 年号デュエル's 1. 東大王からの挑戦状 also leads on device support (3 vs 1) and iOS requirement (12.5 vs 17.0). On price, update cadence and ads there is nothing between them.

Both are free to download. 年号デュエル sells 1 in-app purchase, starting at $1.99 per month. 東大王からの挑戦状 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 東大王からの挑戦状 | 年号デュエル |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (22 ratings)](https://appshunter.io/ios/app/iq/id1442481744/reviews)** | — |
| Number of ratings | **22** | — |
| Positive reviews | 35.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Ad-supported | — |
| Size | 228 MB | 8 MB |
| Requires iOS | **12.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [MIKU KURAKI](https://appshunter.io/developer/1161306102) | [Renzo Ohhama](https://appshunter.io/developer/1812551739) |

## What reviewers say

### 東大王からの挑戦状

[App page](https://appshunter.io/ios/app/iq/id1442481744)

Test your intellect with challenging brain-training quizzes and puzzles. Solve over 150 unique riddles using your intuition and deduction skills. Can you conquer all the puzzles and prove your intelligence?

**Highlights:** Challenging brain-training quizzes, Over 150 riddle-style puzzles, Intuitive deduction gameplay, Tap-based answer input, Unlimited attempts to solve

**Features:** macOS Compatibility

**In-app purchases:** none


### 年号デュエル

[App page](https://appshunter.io/ios/app/id6782941633)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 年号デュエル 月額サポーター | $1.99 | per month |


## Frequently asked questions

### Is 東大王からの挑戦状 free?

東大王からの挑戦状 is free to download, with no in-app purchases.

### Is 年号デュエル free?

年号デュエル is free to download, with in-app purchases available.

### Do 東大王からの挑戦状 or 年号デュエル have ads?

Both 東大王からの挑戦状 and 年号デュエル show ads.

### Which is updated more often, 東大王からの挑戦状 or 年号デュエル?

東大王からの挑戦状 ships an update every 3 months, and 年号デュエル every 3 months. Most recently, 東大王からの挑戦状 was updated on November 2, 2026 and 年号デュエル on October 31, 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.*