# KChem vs 化学マスター

The clearest difference is update cadence: KChem at daily against 化学マスター's every 5 days. KChem also leads on iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. KChem sells 1 in-app purchase, starting at $2.49 per month and 化学マスター sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

KChem ships an update daily, 化学マスター every 5 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | KChem | 化学マスター |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 5 days |
| Monetization | Freemium | — |
| Size | 12 MB | 37 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Akihiko Kitamura](https://appshunter.io/developer/1585792497) | [ryo otsuka](https://appshunter.io/developer/6788628020) |

## What reviewers say

### KChem

[App page](https://appshunter.io/ios/app/kchem/id1601032155)

This app helps high school students memorize organic chemistry concepts efficiently. It features a memorization mode for easy output, comprehensive coverage of high school organic chemistry topics, and clear explanations. Some advanced content requires a subscription.

**Highlights:** Memorization mode for active recall, Comprehensive high school organic chemistry content, Clear and easy-to-understand explanations, Subscription for advanced topics

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム | $2.49 | per month |


### 化学マスター

[App page](https://appshunter.io/ios/app/id6788745347)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 化学マスター Pro | $2.99 | one-time |


## Frequently asked questions

### Is KChem free?

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

### Is 化学マスター free?

化学マスター is free to download, with in-app purchases available.

### Do KChem or 化学マスター have ads?

Neither KChem nor 化学マスター shows ads.

### Which is updated more often, KChem or 化学マスター?

KChem ships an update daily, and 化学マスター every 5 days. Most recently, KChem was updated on October 30, 2026 and 化学マスター on October 31, 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.*