# Boost.AI 英作文添削・共通テスト英語 vs でた単 古文単語 言の葉

The clearest difference is in-app purchases: でた単 古文単語 言の葉 at none against Boost.AI 英作文添削・共通テスト英語's 3. Boost.AI 英作文添削・共通テスト英語's advantage is review sentiment (90% vs 67%) and iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Boost.AI 英作文添削・共通テスト英語 sells 3 in-app purchases, starting at $5.99 per month. でた単 古文単語 言の葉 asks for nothing beyond the download.

Boost.AI 英作文添削・共通テスト英語 ships an update every 4 days, でた単 古文単語 言の葉 every 2 days. Both last shipped on October 20, 2026.

## The numbers

| Metric | Boost.AI 英作文添削・共通テスト英語 | でた単 古文単語 言の葉 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **90.5% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 2 days** |
| Monetization | Freemium | **Free** |
| Size | 143 MB | 37 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ATSUSHI KIMURA](https://appshunter.io/developer/1829870349) | [Namiko Takahashi](https://appshunter.io/developer/1349212420) |

## What reviewers say

### Boost.AI 英作文添削・共通テスト英語

[App page](https://appshunter.io/ios/app/boostai/id6749287559)

This AI-powered app offers instant English writing feedback, detailed explanations, and AI chat for deeper understanding. It supports various writing styles and learning goals, helping users improve their English proficiency anytime, anywhere.

**Highlights:** Instant AI essay correction, Detailed explanations for errors, Handwriting recognition for essays, AI chat for clarification, Learning history management, Diverse question formats, Flashcards and English news

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Boost Pro 月額プラン | $5.99 | per month |
| 3ヶ月 | $11.99 | per 3 months |
| Boost Pro 年額プラン | $39.99 | per year |


### でた単 古文単語 言の葉

[App page](https://appshunter.io/ios/app/id6795464291)

This app offers a comprehensive collection of classical Japanese vocabulary for various academic levels, from basic to advanced. It includes quizzes, typing exercises for difficult kanji and customs, and detailed explanations to aid learning. The content is based on the frequency of words in entrance exam corpora.

**Highlights:** Extensive vocabulary lists for different academic levels, Multiple-choice quizzes on vocabulary and sentence meanings, Typing exercises for kanji and classical customs, Detailed explanations and example sentences, Categorized vocabulary for targeted study, Dictionary function for quick lookups

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

**In-app purchases:** none


## Frequently asked questions

### Is Boost.AI 英作文添削・共通テスト英語 free?

Boost.AI 英作文添削・共通テスト英語 is free to download, with in-app purchases available.

### Is でた単 古文単語 言の葉 free?

でた単 古文単語 言の葉 is free to download, with no in-app purchases.

### Do Boost.AI 英作文添削・共通テスト英語 or でた単 古文単語 言の葉 have ads?

Neither Boost.AI 英作文添削・共通テスト英語 nor でた単 古文単語 言の葉 shows ads.

### Which is updated more often, Boost.AI 英作文添削・共通テスト英語 or でた単 古文単語 言の葉?

Boost.AI 英作文添削・共通テスト英語 ships an update every 4 days, and でた単 古文単語 言の葉 every 2 days. Most recently, Boost.AI 英作文添削・共通テスト英語 was updated on October 20, 2026 and でた単 古文単語 言の葉 on October 20, 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.*