# 中1計算問題 方程式 vs 中2英単語400

The clearest difference is review sentiment: 中1計算問題 方程式 at 100% against 中2英単語400's 40%. 中1計算問題 方程式 also leads on in-app purchases (none vs 1). 中2英単語400's advantage is update cadence (every 11 months vs every 44 months). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. 中2英単語400 sells 1 in-app purchase, starting at $1.99 per month. 中1計算問題 方程式 asks for nothing beyond the download.

中1計算問題 方程式 ships an update every 44 months, 中2英単語400 every 11 months. The most recent releases landed on October 17, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | 中1計算問題 方程式 | 中2英単語400 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 40.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 44 months | **Every 11 months** |
| Monetization | Ad-supported | Ad-supported |
| Size | 14 MB | 79 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Manabu Narawa](https://appshunter.io/developer/1027712863) | [Junpei Shimotsu](https://appshunter.io/developer/882299124) |

## What reviewers say

### 中1計算問題 方程式

[App page](https://appshunter.io/ios/app/1/id1355992855)

Practice solving algebraic equations with over 380 problems, ranging from basic to advanced levels. Includes example problems to explain fundamental solving methods. Input answers directly for comprehensive skill development.

**Highlights:** Over 380 equation problems, Levels from basic to advanced, Direct numerical answer input, Example problems for solving methods, Integer, decimal, and fraction support

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

**In-app purchases:** none


### 中2英単語400

[App page](https://appshunter.io/ios/app/2400/id1470578020)

This app helps students efficiently learn 400 English words for the second year of junior high school. It uses multiple-choice, handwriting, and listening modes to reinforce vocabulary through quizzes and personalized review. Track your progress with detailed statistics and improve pronunciation with audio playback.

**Highlights:** 400 junior high second-year English words, Multiple-choice, handwriting, and listening modes, Personalized review of incorrect words, Progress tracking and statistics, Audio playback for pronunciation, Stage-based learning structure

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| １ヶ月広告削除 | $1.99 | per month |


## Frequently asked questions

### Is 中1計算問題 方程式 free?

中1計算問題 方程式 is free to download, with no in-app purchases.

### Is 中2英単語400 free?

中2英単語400 is free to download, with in-app purchases available.

### Do 中1計算問題 方程式 or 中2英単語400 have ads?

Both 中1計算問題 方程式 and 中2英単語400 show ads.

### Which is updated more often, 中1計算問題 方程式 or 中2英単語400?

中1計算問題 方程式 ships an update every 44 months, and 中2英単語400 every 11 months. Most recently, 中1計算問題 方程式 was updated on October 17, 2026 and 中2英単語400 on October 13, 2026.

---

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