# 有機化学の構造式 vs Boost.AI 英作文添削・共通テスト英語

The clearest difference is price: Boost.AI 英作文添削・共通テスト英語 at Free against 有機化学の構造式's $5.99. 有機化学の構造式's advantage is in-app purchases (none vs 3). On review sentiment, update cadence, ads and device support there is nothing between them.

Boost.AI 英作文添削・共通テスト英語 is free to download; 有機化学の構造式 costs $5.99 up front. 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. 有機化学の構造式 asks for nothing beyond the download.

有機化学の構造式 ships an update every 2 days, Boost.AI 英作文添削・共通テスト英語 every 3 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | 有機化学の構造式 | Boost.AI 英作文添削・共通テスト英語 |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Positive reviews | **94.1% of reviews** | 90.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 3 days |
| Monetization | — | Freemium |
| Size | 201 MB | 151 MB |
| Requires iOS | 16.7 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hideki Touhara](https://appshunter.io/developer/1268738829) | [ATSUSHI KIMURA](https://appshunter.io/developer/1829870349) |

## What reviewers say

### 有機化学の構造式

[App page](https://appshunter.io/ios/app/id1268738830)

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

**In-app purchases:** none


### Boost.AI 英作文添削・共通テスト英語

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

Practice past Common Test English exams with AI-powered essay correction. Improve reading, listening, and writing skills with detailed feedback and practice exercises. Review vocabulary and grammar to prepare for university entrance exams and English proficiency tests.

**Highlights:** Common Test reading and listening practice, AI essay correction for free writing and translation, Review vocabulary and grammar, Photo upload for handwritten essay correction, AI chat for clarification on corrections, Practice for university entrance exams and English tests

**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 |


## Frequently asked questions

### Is 有機化学の構造式 free?

有機化学の構造式 costs $5.99, with no in-app purchases.

### 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.

### Do 有機化学の構造式 or Boost.AI 英作文添削・共通テスト英語 have ads?

Neither 有機化学の構造式 nor Boost.AI 英作文添削・共通テスト英語 shows ads.

### Which is updated more often, 有機化学の構造式 or Boost.AI 英作文添削・共通テスト英語?

有機化学の構造式 ships an update every 2 days, and Boost.AI 英作文添削・共通テスト英語 every 3 days. Most recently, 有機化学の構造式 was updated on November 3, 2026 and Boost.AI 英作文添削・共通テスト英語 on November 5, 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.*