# Proverb Robo vs 四字熟語の暗記・反復学習｜エビ四

The clearest difference is review sentiment: 四字熟語の暗記・反復学習｜エビ四 at 100% against Proverb Robo's 50%. 四字熟語の暗記・反復学習｜エビ四 also leads on update cadence (every 2 months vs every 5 months). Proverb Robo's advantage is in-app purchases (none vs 1). On price, ads, monetization model and device support 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. Proverb Robo asks for nothing beyond the download.

Proverb Robo ships an update every 5 months, 四字熟語の暗記・反復学習｜エビ四 every 2 months. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Proverb Robo | 四字熟語の暗記・反復学習｜エビ四 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/proverb-robo/id832484884/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Ad-supported | Ad-supported |
| Size | 57 MB | 13 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MASAHIRO MIZUTANI](https://appshunter.io/developer/368158224) | [keiji imamura](https://appshunter.io/developer/1496803101) |

## What reviewers say

### Proverb Robo

[App page](https://appshunter.io/ios/app/proverb-robo/id832484884)

Discover the meaning and context of Japanese proverbs (Kotowaza). This app offers a fun way to learn these traditional sayings, focusing exclusively on Japanese content. Expand your understanding of Japanese culture through its common wisdom.

**Highlights:** Learn Japanese proverbs, Understand Kotowaza meanings, Focus on Japanese language, Educational content, Cultural insights

**Features:** Vision Pro support

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Proverb Robo free?

Proverb Robo is free to download, with no in-app purchases.

### 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.

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

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

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

Proverb Robo ships an update every 5 months, and 四字熟語の暗記・反復学習｜エビ四 every 2 months. Most recently, Proverb Robo was updated on October 19, 2026 and 四字熟語の暗記・反復学習｜エビ四 on October 24, 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.*