# 中2連立方程式 計算問題 vs 中2英単語400

The clearest difference is review sentiment: 中2連立方程式 計算問題 at 86% against 中2英単語400's 40%. 中2連立方程式 計算問題 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 38 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2連立方程式 計算問題 asks for nothing beyond the download.

中2連立方程式 計算問題 ships an update every 38 months, 中2英単語400 every 11 months. The most recent releases landed on October 1, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | 中2連立方程式 計算問題 | 中2英単語400 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **85.7% of reviews** | 40.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 38 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2連立方程式 計算問題

[App page](https://appshunter.io/ios/app/2/id1434256775)

Practice solving simultaneous equations for 2nd-year junior high students. Includes detailed solutions and example problems to help those new to or struggling with the concept. Master basic problems to build confidence for high school entrance exams.

**Highlights:** Simultaneous equation practice, Detailed step-by-step solutions, Example problem explanations, Focus on basic problem mastery, Preparation for high school entrance exams

**Features:** macOS Compatibility

**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2連立方程式 計算問題 free?

中2連立方程式 計算問題 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2連立方程式 計算問題 or 中2英単語400 have ads?

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

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

中2連立方程式 計算問題 ships an update every 38 months, and 中2英単語400 every 11 months. Most recently, 中2連立方程式 計算問題 was updated on October 1, 2026 and 中2英単語400 on September 27, 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.*