# 無機化学 vs SigmaPlayer2

The clearest difference is in-app purchases: 無機化学 at none against SigmaPlayer2's 12. 無機化学 also leads on update cadence (every 2 days vs every 2 months). SigmaPlayer2's advantage is iOS requirement (12.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. SigmaPlayer2 sells 12 one-off in-app purchases. 無機化学 asks for nothing beyond the download.

無機化学 ships an update every 2 days, SigmaPlayer2 every 2 months. The most recent releases landed on October 26, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | 無機化学 | SigmaPlayer2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/id1351078183/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 98.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 2 months |
| Size | 40 MB | 19 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hideki Touhara](https://appshunter.io/developer/1268738829) | [BUN-EIDO PUBLISHING CO.,LTD.](https://appshunter.io/developer/1082594050) |

## 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


### SigmaPlayer2

[App page](https://appshunter.io/ios/app/sigmaplayer2/id1449804072)

**Features:** macOS Compatibility

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SWITCH Stage4 | $0.99 | one-time |
| SWITCH Stage5 | $0.99 | one-time |
| 単語帳カスタム再生機能 | $3.99 | one-time |
| ユニコンコミュニケーション2 CD | $4.99 | one-time |
| ユニコンコミュニケーション1 CD | $4.99 | one-time |
| グローブコミュニケーション2 CD | $4.99 | one-time |
| グローブコミュニケーション1 CD | $4.99 | one-time |
| グローブコミュニケーション3 CD | $4.99 | one-time |
| ユニコンコミュニケーション3 CD | $4.99 | one-time |
| Grove English Communication Ⅰ | $4.99 | one-time |
| Grove English Communication II | $4.99 | one-time |
| グローブ英語コミュニケーションⅢ | $4.99 | one-time |


## Frequently asked questions

### Is 無機化学 free?

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

### Is SigmaPlayer2 free?

SigmaPlayer2 is free to download, with in-app purchases available.

### Do 無機化学 or SigmaPlayer2 have ads?

Neither 無機化学 nor SigmaPlayer2 shows ads.

### Which is updated more often, 無機化学 or SigmaPlayer2?

無機化学 ships an update every 2 days, and SigmaPlayer2 every 2 months. Most recently, 無機化学 was updated on October 26, 2026 and SigmaPlayer2 on October 19, 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.*