# ４択化学 vs 高校生物 一問一答｜生物マスター

The clearest difference is ads: ４択化学 at none against 高校生物 一問一答｜生物マスター's shown. ４択化学 also leads on iOS requirement (17.0 vs 26.2). 高校生物 一問一答｜生物マスター's advantage is update cadence (fortnightly vs every 2 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

４択化学 ships an update every 2 months, 高校生物 一問一答｜生物マスター fortnightly. The most recent releases landed on October 20, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | ４択化学 | 高校生物 一問一答｜生物マスター |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 26.7% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 6 MB | 12 MB |
| Requires iOS | **17.0** | 26.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [junpei ono](https://appshunter.io/developer/656630939) | [Hirokazu Kurokawa](https://appshunter.io/developer/463196366) |

## 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


### 高校生物 一問一答｜生物マスター

[App page](https://appshunter.io/ios/app/id6807654856)

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

**In-app purchases:** none


## Frequently asked questions

### Is ４択化学 free?

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

### Is 高校生物 一問一答｜生物マスター free?

高校生物 一問一答｜生物マスター is free to download, with no in-app purchases.

### Do ４択化学 or 高校生物 一問一答｜生物マスター have ads?

高校生物 一問一答｜生物マスター shows ads; ４択化学 does not.

### Which is updated more often, ４択化学 or 高校生物 一問一答｜生物マスター?

４択化学 ships an update every 2 months, and 高校生物 一問一答｜生物マスター fortnightly. Most recently, ４択化学 was updated on October 20, 2026 and 高校生物 一問一答｜生物マスター on October 9, 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.*