# 化学の王様 vs ring つなげる知識、ひろげる輪

The clearest difference is rating: 化学の王様 at 5.0 against ring つなげる知識、ひろげる輪's 3.3. ring つなげる知識、ひろげる輪's advantage is review sentiment (67% vs 42%) and iOS requirement (13.0 vs 15.0). On price, ratings volume, update cadence and ads 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 and ring つなげる知識、ひろげる輪 sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

化学の王様 holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews complicate that: 42% of 化学の王様's written reviews are positive against 67% of ring つなげる知識、ひろげる輪's, so the app with the better star average is not the one people write more warmly about.

化学の王様 ships an update every 3 weeks, ring つなげる知識、ひろげる輪 monthly. The most recent releases landed on October 15, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | 化学の王様 | ring つなげる知識、ひろげる輪 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/id1519715518/reviews)** | [3.3 (4 ratings)](https://appshunter.io/ios/app/ring/id1530177505/reviews) |
| Number of ratings | 3 | **4** |
| Positive reviews | 42.0% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 139 MB | 73 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HANAUTA INC.](https://appshunter.io/developer/492009717) | [STARDY, K.K.](https://appshunter.io/developer/1530177507) |

## What reviewers say

### 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 |


### ring つなげる知識、ひろげる輪

[App page](https://appshunter.io/ios/app/ring/id1530177505)

Create and share flashcards with images, equations, and illustrations. Generate quizzes from card sets for study or friendly competition. Save and search for card sets to learn from others.

**Highlights:** Create flashcards with images, Share flashcards with others, Generate quizzes from card sets, Track study progress, Save favorite card sets, Search for card sets by genre

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1ヶ月快適プラン120円 | $0.99 | per month |
| 6ヶ月快適プラン500円 | $4.49 | per 6 months |
| 1年快適プラン980円 | $8.99 | per year |

**What reviewers like**

- 👍 Simple and easy to see
- 👍 Easy to understand by grade
- 👍 Easy to memorize and study anywhere
- 👍 Can create own cards, use others'
- 👍 Best flashcard app, used for 5 years

**What reviewers complain about**

- 🐛 Slow loading and saving
- 🐛 Limited features
- 🐛 Not compatible with iPhone only
- 🐛 App crashes frequently
- 🐛 Slow startup sometimes

**Reported bugs**

- App crashes when publishing
- Saving and publishing takes over 30 minutes
- App crashes during editing
- Data lost when app crashes
- App freezes on title screen

**Requested features**

- Ability to change card order during creation
- Faster load times
- Ability to review only marked words
- Predictive text for card backs
- Ability to add cards to existing sets easily


## Frequently asked questions

### Is 化学の王様 free?

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

### Is ring つなげる知識、ひろげる輪 free?

ring つなげる知識、ひろげる輪 is free to download, with in-app purchases available.

### Which has better reviews, 化学の王様 or ring つなげる知識、ひろげる輪?

化学の王様 is rated higher. 化学の王様 averages 5.0 out of 5 from 3 ratings, while ring つなげる知識、ひろげる輪 averages 3.3 from 4 ratings.

### Do 化学の王様 or ring つなげる知識、ひろげる輪 have ads?

Both 化学の王様 and ring つなげる知識、ひろげる輪 show ads.

### Which is updated more often, 化学の王様 or ring つなげる知識、ひろげる輪?

化学の王様 ships an update every 3 weeks, and ring つなげる知識、ひろげる輪 monthly. Most recently, 化学の王様 was updated on October 15, 2026 and ring つなげる知識、ひろげる輪 on October 14, 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.*