# ４択化学 vs 高校化学・化学基礎の一問一答：ケムクイズ

The clearest difference is in-app purchases: ４択化学 at none against 高校化学・化学基礎の一問一答：ケムクイズ's 1. ４択化学 also leads on ads (none vs shown). 高校化学・化学基礎の一問一答：ケムクイズ's advantage is update cadence (every 11 days vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. 高校化学・化学基礎の一問一答：ケムクイズ sells 1 one-off in-app purchase. ４択化学 asks for nothing beyond the download.

４択化学 ships an update every 2 months, 高校化学・化学基礎の一問一答：ケムクイズ every 11 days. The most recent releases landed on October 20, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | ４択化学 | 高校化学・化学基礎の一問一答：ケムクイズ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 26.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 11 days** |
| Size | 6 MB | 18 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [junpei ono](https://appshunter.io/developer/656630939) | [TomatoAppLab](https://appshunter.io/developer/1676711750) |

## What reviewers say

### ４択化学

[App page](https://appshunter.io/ios/app/id960647263)

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

**In-app purchases:** none


### 高校化学・化学基礎の一問一答：ケムクイズ

[App page](https://appshunter.io/ios/app/id6763279883)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告をずっと非表示にする | $3.99 | one-time |


## Frequently asked questions

### Is ４択化学 free?

４択化学 is free to download, with no in-app purchases.

### Is 高校化学・化学基礎の一問一答：ケムクイズ free?

高校化学・化学基礎の一問一答：ケムクイズ is free to download, with in-app purchases available.

### Do ４択化学 or 高校化学・化学基礎の一問一答：ケムクイズ have ads?

高校化学・化学基礎の一問一答：ケムクイズ shows ads; ４択化学 does not.

### Which is updated more often, ４択化学 or 高校化学・化学基礎の一問一答：ケムクイズ?

４択化学 ships an update every 2 months, and 高校化学・化学基礎の一問一答：ケムクイズ every 11 days. Most recently, ４択化学 was updated on October 20, 2026 and 高校化学・化学基礎の一問一答：ケムクイズ on October 28, 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.*