# 英熟語センター750 vs 化学の王様

The clearest difference is in-app purchases: 英熟語センター750 at none against 化学の王様's 3. 英熟語センター750 also leads on ads (none vs shown) and iOS requirement (7.0 vs 15.0). 化学の王様's advantage is update cadence (every 3 weeks vs every 7 months). On price, review sentiment and device support there is nothing between them.

Both are free to download. 化学の王様 sells 3 in-app purchases, starting at $3.49 per month. 英熟語センター750 asks for nothing beyond the download.

英熟語センター750 ships an update every 7 months, 化学の王様 every 3 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 英熟語センター750 | 化学の王様 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/id1519715518/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 35.0% of reviews | **42.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 104 MB | 139 MB |
| Requires iOS | **7.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [株式会社ナガセ](https://appshunter.io/developer/447743163) | [HANAUTA INC.](https://appshunter.io/developer/492009717) |

## What reviewers say

### 英熟語センター750

[App page](https://appshunter.io/ios/app/750/id499224982)

This app helps high school students master essential English idioms for university entrance exams. It focuses on 750 frequently appearing idioms, ordered by frequency, with features for focused learning and audio review.

**Highlights:** 750 essential idioms, Ordered by exam frequency, Focused learning on unknown idioms, Audio learning for pronunciation and review, Progress tracking

**Features:** Vision Pro support

**In-app purchases:** none


### 化学の王様

[App page](https://appshunter.io/ios/app/id1519715518)

This app offers a fun, quiz-like approach to learning high school chemistry. It features over 3000 questions in various formats and is designed to help users memorize key concepts for exams. Users can progress through stages and earn rewards while studying.

**Highlights:** Over 3000 chemistry questions, Quiz-like learning format, Short play sessions, Exam preparation content, Game-like progression, Gift rewards for quests

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 合格プラン | $3.49 | per month |
| 合格プラン | $17.49 | per 6 months |
| 合格プラン | $27.99 | per year |


## Frequently asked questions

### Is 英熟語センター750 free?

英熟語センター750 is free to download, with no in-app purchases.

### Is 化学の王様 free?

化学の王様 is free to download, with in-app purchases available.

### Do 英熟語センター750 or 化学の王様 have ads?

化学の王様 shows ads; 英熟語センター750 does not.

### Which is updated more often, 英熟語センター750 or 化学の王様?

英熟語センター750 ships an update every 7 months, and 化学の王様 every 3 weeks. Most recently, 英熟語センター750 was updated on November 1, 2026 and 化学の王様 on November 3, 2026.

---

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