# 地理総合・地理探究｜アシストシステム vs Boost.AI 英作文添削・共通テスト英語

The clearest difference is in-app purchases: 地理総合・地理探究｜アシストシステム 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 ads (none vs shown) and update cadence (every 4 days vs fortnightly). On price 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. 地理総合・地理探究｜アシストシステム asks for nothing beyond the download.

地理総合・地理探究｜アシストシステム ships an update fortnightly, Boost.AI 英作文添削・共通テスト英語 every 4 days. The most recent releases landed on October 8, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | 地理総合・地理探究｜アシストシステム | Boost.AI 英作文添削・共通テスト英語 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 90.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | — | Freemium |
| Size | 241 MB | 143 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tsuyoshi Hayakawa](https://appshunter.io/developer/314516929) | [ATSUSHI KIMURA](https://appshunter.io/developer/1829870349) |

## What reviewers say

### 地理総合・地理探究｜アシストシステム

[App page](https://appshunter.io/ios/app/id6737373442)

**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)

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 |


## Frequently asked questions

### Is 地理総合・地理探究｜アシストシステム free?

地理総合・地理探究｜アシストシステム is free to download, 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 地理総合・地理探究｜アシストシステム or Boost.AI 英作文添削・共通テスト英語 have ads?

地理総合・地理探究｜アシストシステム shows ads; Boost.AI 英作文添削・共通テスト英語 does not.

### Which is updated more often, 地理総合・地理探究｜アシストシステム or Boost.AI 英作文添削・共通テスト英語?

地理総合・地理探究｜アシストシステム ships an update fortnightly, and Boost.AI 英作文添削・共通テスト英語 every 4 days. Most recently, 地理総合・地理探究｜アシストシステム was updated on October 8, 2026 and Boost.AI 英作文添削・共通テスト英語 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.*