# 共通テスト対応英単語1800 vs 改 理解を深める 核心古文単語351

The clearest difference is update cadence: 改 理解を深める 核心古文単語351 at every 3 days against 共通テスト対応英単語1800's every 18 months. 改 理解を深める 核心古文単語351 also leads on iOS requirement (10.0 vs 12.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

共通テスト対応英単語1800 ships an update every 18 months, 改 理解を深める 核心古文単語351 every 3 days. The most recent releases landed on September 24, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | 共通テスト対応英単語1800 | 改 理解を深める 核心古文単語351 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 46.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 156 MB | 22 MB |
| Requires iOS | 12.0 | **10.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [株式会社ナガセ](https://appshunter.io/developer/447743163) | [SYOBUN SHUPPAN CO.LTD.](https://appshunter.io/developer/1224576325) |

## What reviewers say

### 共通テスト対応英単語1800

[App page](https://appshunter.io/ios/app/1800/id785904625)

Master essential English vocabulary for university entrance exams with this dedicated app. It covers 99.5% of the vocabulary tested on the Center Test and other university entrance exams, focusing on the 1800 most crucial words for high school students.

**Highlights:** Covers 99.5% of Center Test vocabulary, Focuses on 1800 essential words, Based on successful exam preparation methods, Designed for high school and university exam students, Master vocabulary quickly and completely

**Features:** Vision Pro support

**In-app purchases:** none


### 改 理解を深める 核心古文単語351

[App page](https://appshunter.io/ios/app/351/id6444208641)

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

**In-app purchases:** none


## Frequently asked questions

### Is 共通テスト対応英単語1800 free?

共通テスト対応英単語1800 is free to download, with no in-app purchases.

### Is 改 理解を深める 核心古文単語351 free?

改 理解を深める 核心古文単語351 is free to download, with no in-app purchases.

### Do 共通テスト対応英単語1800 or 改 理解を深める 核心古文単語351 have ads?

Neither 共通テスト対応英単語1800 nor 改 理解を深める 核心古文単語351 shows ads.

### Which is updated more often, 共通テスト対応英単語1800 or 改 理解を深める 核心古文単語351?

共通テスト対応英単語1800 ships an update every 18 months, and 改 理解を深める 核心古文単語351 every 3 days. Most recently, 共通テスト対応英単語1800 was updated on September 24, 2026 and 改 理解を深める 核心古文単語351 on September 21, 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.*