# 四字熟語の暗記・反復学習｜エビ四 vs 四字熟語の王様

The clearest difference is review sentiment: 四字熟語の暗記・反復学習｜エビ四 at 100% against 四字熟語の王様's 50%. 四字熟語の暗記・反復学習｜エビ四 also leads on monetization model (ad-supported vs free with in-app purchases). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 四字熟語の暗記・反復学習｜エビ四 sells 1 one-off in-app purchase and 四字熟語の王様 sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

四字熟語の暗記・反復学習｜エビ四 ships an update every 2 months, 四字熟語の王様 every 5 weeks. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | 四字熟語の暗記・反復学習｜エビ四 | 四字熟語の王様 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 13 MB | 138 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [keiji imamura](https://appshunter.io/developer/1496803101) | [HANAUTA INC.](https://appshunter.io/developer/492009717) |

## What reviewers say

### 四字熟語の暗記・反復学習｜エビ四

[App page](https://appshunter.io/ios/app/id1504085749)

Learn 1600 Japanese four-character idioms through engaging quizzes and a spaced repetition system. This app helps improve vocabulary and prepare for exams and general knowledge tests, incorporating proverbs and idiomatic expressions.

**Highlights:** 1600 four-character idioms included, Spaced repetition algorithm, Game-like learning, Simple and intuitive interface, Randomized quiz questions, Progress tracking for mastery

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示 | $2.99 | one-time |


### 四字熟語の王様

[App page](https://appshunter.io/ios/app/and/id1611707530)

Master Japanese four-character idioms with this quiz-style learning app. It offers over 3000 questions in various formats, making study sessions short and engaging. Ideal for exam preparation and cultural understanding.

**Highlights:** Over 3000 questions, Quiz-like learning, Short play sessions, Game-like progression, Exam preparation, Easy Q/A format

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 特訓プラン | $2.99 | per month |
| 特訓プラン | $15.99 | per 6 months |
| 特訓プラン | $25.49 | per year |


## Frequently asked questions

### Is 四字熟語の暗記・反復学習｜エビ四 free?

四字熟語の暗記・反復学習｜エビ四 is free to download, with in-app purchases available.

### Is 四字熟語の王様 free?

四字熟語の王様 is free to download, with in-app purchases available.

### Do 四字熟語の暗記・反復学習｜エビ四 or 四字熟語の王様 have ads?

Both 四字熟語の暗記・反復学習｜エビ四 and 四字熟語の王様 show ads.

### Which is updated more often, 四字熟語の暗記・反復学習｜エビ四 or 四字熟語の王様?

四字熟語の暗記・反復学習｜エビ四 ships an update every 2 months, and 四字熟語の王様 every 5 weeks. Most recently, 四字熟語の暗記・反復学習｜エビ四 was updated on October 24, 2026 and 四字熟語の王様 on October 13, 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.*