# 高分子 化学(有機・無機) 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 高分子 化学(有機・無機)'s $4.99. 高分子 化学(有機・無機)'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; 高分子 化学(有機・無機) costs $4.99 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. 高分子 化学(有機・無機) asks for nothing beyond the download.

高分子 化学(有機・無機) ships an update every 2 days, Boost.AI 英作文添削・共通テスト英語 every 4 days. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 高分子 化学(有機・無機) | Boost.AI 英作文添削・共通テスト英語 |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Positive reviews | 82.6% of reviews | **90.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 4 days |
| Monetization | Paid | **Freemium** |
| Size | 40 MB | 151 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | 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

### 高分子 化学(有機・無機)

[App page](https://appshunter.io/ios/app/id1315239186)

Master polymer chemistry with this comprehensive study app. It features over 950 practice questions based on university entrance exams, covering organic and inorganic polymer compounds. Track your progress and reinforce learning with various test modes and customizable review lists.

**Highlights:** 951 practice questions, University entrance exam focus, Covers organic and inorganic polymers, Detailed explanations, Progress tracking and scoring, Customizable review lists, Multiple test modes

**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 exams for the Common Test in English and get AI-powered essay feedback. Improve reading, listening, and writing skills with AI-driven corrections and explanations. Review vocabulary and grammar to prepare for university entrance exams and English proficiency tests.

**Highlights:** Common Test English past paper practice, AI essay correction and scoring, Reading and listening practice with audio, Vocabulary and grammar review, Handwritten answer input via photo, AI chat for clarification

**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 高分子 化学(有機・無機) free?

高分子 化学(有機・無機) costs $4.99, 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 高分子 化学(有機・無機) or Boost.AI 英作文添削・共通テスト英語 have ads?

Neither 高分子 化学(有機・無機) nor Boost.AI 英作文添削・共通テスト英語 shows ads.

### Which is updated more often, 高分子 化学(有機・無機) or Boost.AI 英作文添削・共通テスト英語?

高分子 化学(有機・無機) ships an update every 2 days, and Boost.AI 英作文添削・共通テスト英語 every 4 days. Most recently, 高分子 化学(有機・無機) was updated on October 29, 2026 and Boost.AI 英作文添削・共通テスト英語 on October 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*