# Boost.AI 英作文添削・共通テスト英語 vs 読書記録アプリ

The clearest difference is in-app purchases: 読書記録アプリ 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 update cadence (every 4 days vs every 5 weeks). On price, ads, device support and iOS requirement 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. 読書記録アプリ 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, 読書記録アプリ every 5 weeks. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Boost.AI 英作文添削・共通テスト英語 | 読書記録アプリ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 90.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 weeks |
| Monetization | Freemium | — |
| Size | 151 MB | 212 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [ATSUSHI KIMURA](https://appshunter.io/developer/1829870349) | [hajime honjo](https://appshunter.io/developer/1855833350) |

## 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)

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 |


### 読書記録アプリ

[App page](https://appshunter.io/ios/app/kagamipalette/id6755719187)

**Features:** macOS Compatibility

**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 読書記録アプリ free?

読書記録アプリ 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 読書記録アプリ have ads?

Neither Boost.AI 英作文添削・共通テスト英語 nor 読書記録アプリ shows ads.

### Which is updated more often, Boost.AI 英作文添削・共通テスト英語 or 読書記録アプリ?

Boost.AI 英作文添削・共通テスト英語 ships an update every 4 days, and 読書記録アプリ every 5 weeks. Most recently, Boost.AI 英作文添削・共通テスト英語 was updated on October 30, 2026 and 読書記録アプリ on October 28, 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.*