# 化学マスター vs ChronoMap

The clearest difference is in-app purchases: ChronoMap at none against 化学マスター's 1. ChronoMap also leads on iOS requirement (15.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 化学マスター sells 1 one-off in-app purchase. ChronoMap asks for nothing beyond the download.

化学マスター ships an update every 5 days, ChronoMap every 3 days. The most recent releases landed on October 25, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | 化学マスター | ChronoMap |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 3 days** |
| Monetization | — | Free |
| Size | 24 MB | 99 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ryo otsuka](https://appshunter.io/developer/6788628020) | [HOIPOI Co., Ltd.](https://appshunter.io/developer/6801120710) |

## What reviewers say

### 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 |


### ChronoMap

[App page](https://appshunter.io/ios/app/chronomap/id6801120707)

Explore human history with an interactive world map and timeline. Witness political borders shift and events unfold in their geographical context. Features narrated stories, quizzes, and detailed information on historical periods and places.

**Highlights:** Animated historical maps from 28,000 BC to present, 2,794 explained historical events and people, 52 narrated historical stories, Blank-map quizzes and drills, Relationship trees for historical themes, Offline access to all data, Spaced-repetition review for collected cards

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

**In-app purchases:** none


## Frequently asked questions

### Is 化学マスター free?

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

### Is ChronoMap free?

ChronoMap is free to download, with no in-app purchases.

### Do 化学マスター or ChronoMap have ads?

Neither 化学マスター nor ChronoMap shows ads.

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

化学マスター ships an update every 5 days, and ChronoMap every 3 days. Most recently, 化学マスター was updated on October 25, 2026 and ChronoMap on October 20, 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.*