# 無機化学 vs ring つなげる知識、ひろげる輪

The clearest difference is rating: 無機化学 at 5.0 against ring つなげる知識、ひろげる輪's 3.3. 無機化学 also leads on in-app purchases (none vs 3) and ads (none vs shown). ring つなげる知識、ひろげる輪's advantage is iOS requirement (13.0 vs 15.6). On price, ratings volume and device support there is nothing between them.

Both are free to download. ring つなげる知識、ひろげる輪 sells 3 in-app purchases, starting at $0.99 per month. 無機化学 asks for nothing beyond the download.

無機化学 holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews point the same way: 98% of 無機化学's written reviews are positive against 67% of ring つなげる知識、ひろげる輪's.

無機化学 ships an update every 2 days, ring つなげる知識、ひろげる輪 monthly. The most recent releases landed on October 18, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | 無機化学 | ring つなげる知識、ひろげる輪 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/id1351078183/reviews)** | [3.3 (4 ratings)](https://appshunter.io/ios/app/ring/id1530177505/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | **98.1% of reviews** | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 days** | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 40 MB | 73 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hideki Touhara](https://appshunter.io/developer/1268738829) | [STARDY, K.K.](https://appshunter.io/developer/1530177507) |

## What reviewers say

### 無機化学

[App page](https://appshunter.io/ios/app/id1351078183)

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

**In-app purchases:** none


### 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 無機化学 free?

無機化学 is free to download, with no in-app purchases.

### 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, 無機化学 or ring つなげる知識、ひろげる輪?

無機化学 is rated higher. 無機化学 averages 5.0 out of 5 from 2 ratings, while ring つなげる知識、ひろげる輪 averages 3.3 from 4 ratings.

### Do 無機化学 or ring つなげる知識、ひろげる輪 have ads?

ring つなげる知識、ひろげる輪 shows ads; 無機化学 does not.

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

無機化学 ships an update every 2 days, and ring つなげる知識、ひろげる輪 monthly. Most recently, 無機化学 was updated on October 18, 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.*