# 世界の国旗クイズ vs 東大王からの挑戦状

The clearest difference is in-app purchases: 東大王からの挑戦状 at none against 世界の国旗クイズ's 1. 東大王からの挑戦状 also leads on update cadence (every 3 months vs every 7 months) and iOS requirement (12.5 vs 16.0). 世界の国旗クイズ's advantage is review sentiment (59% vs 36%) and rating (4.4 vs 4.1). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. 世界の国旗クイズ 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.

世界の国旗クイズ holds the better App Store score, 4.4 against 4.1. Both are backed by a comparable volume of ratings — 9 and 22 respectively. Written reviews point the same way: 59% of 世界の国旗クイズ's written reviews are positive against 36% of 東大王からの挑戦状's.

世界の国旗クイズ ships an update every 7 months, 東大王からの挑戦状 every 3 months. Both last shipped on November 6, 2026.

## The numbers

| Metric | 世界の国旗クイズ | 東大王からの挑戦状 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (9 ratings)](https://appshunter.io/ios/app/id440650493/reviews)** | [4.1 (22 ratings)](https://appshunter.io/ios/app/iq/id1442481744/reviews) |
| Number of ratings | 9 | **22** |
| Positive reviews | **59.1% of reviews** | 35.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 54 MB | 228 MB |
| Requires iOS | 16.0 | **12.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [StudySwitch, Inc.](https://appshunter.io/developer/1368900403) | [MIKU KURAKI](https://appshunter.io/developer/1161306102) |

## What reviewers say

### 世界の国旗クイズ

[App page](https://appshunter.io/ios/app/id440650493)

Test your knowledge of national flags with this quiz app. It features quizzes from beginner to regional levels, and displays the country's location on a world map and its capital city after each answer. Enjoy it as a general knowledge, educational, or brain training game.

**Highlights:** Quizzes for 194 countries and regions, Step-up difficulty levels, World map and capital city display, General knowledge and brain training, Ad-free option available

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 学習集中プラン | $1.99 | per month |


### 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


## Frequently asked questions

### Is 世界の国旗クイズ free?

世界の国旗クイズ is free to download, with in-app purchases available.

### 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.

### Which has better reviews, 世界の国旗クイズ or 東大王からの挑戦状?

世界の国旗クイズ is rated higher. 世界の国旗クイズ averages 4.4 out of 5 from 9 ratings, while 東大王からの挑戦状 averages 4.1 from 22 ratings.

### Do 世界の国旗クイズ or 東大王からの挑戦状 have ads?

Both 世界の国旗クイズ and 東大王からの挑戦状 show ads.

### Which is updated more often, 世界の国旗クイズ or 東大王からの挑戦状?

世界の国旗クイズ ships an update every 7 months, and 東大王からの挑戦状 every 3 months. Most recently, 世界の国旗クイズ was updated on November 6, 2026 and 東大王からの挑戦状 on November 6, 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.*