# 日本地理クイズ 楽しく学べる教材シリーズ vs CosmicObserver

The clearest difference is price: CosmicObserver at Free against 日本地理クイズ 楽しく学べる教材シリーズ's $3.99. CosmicObserver also leads on update cadence (every 5 weeks vs every 4 months). 日本地理クイズ 楽しく学べる教材シリーズ's advantage is in-app purchases (none vs 1) and device support (3 vs 1). On ads there is nothing between them.

CosmicObserver is free to download; 日本地理クイズ 楽しく学べる教材シリーズ costs $3.99 up front. CosmicObserver sells 1 one-off in-app purchase. 日本地理クイズ 楽しく学べる教材シリーズ asks for nothing beyond the download.

日本地理クイズ 楽しく学べる教材シリーズ ships an update every 4 months, CosmicObserver every 5 weeks. The most recent releases landed on September 21, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | 日本地理クイズ 楽しく学べる教材シリーズ | CosmicObserver |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Monetization | Paid | — |
| Size | 130 MB | 233 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Gloding Inc.](https://appshunter.io/developer/780228385) | [Yuichi Okuno](https://appshunter.io/developer/1803911141) |

## What reviewers say

### 日本地理クイズ 楽しく学べる教材シリーズ

[App page](https://appshunter.io/ios/app/id857557884)

Learn Japanese geography through engaging quizzes covering mountains, rivers, and map symbols. Features audio narration and progress tracking, suitable for ages 4 and up. Designed to make learning fun for students and adults interested in Japan.

**Highlights:** Japanese geography quizzes, Covers mountains, rivers, plains, and map symbols, Audio narration for questions, Progress tracking by category, Suitable for ages 4+, Award-winning educational app

**Features:** macOS Compatibility

**In-app purchases:** none


### CosmicObserver

[App page](https://appshunter.io/ios/app/cosmicobserver/id6787430312)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cosmic Pass | $4.99 | one-time |


## Frequently asked questions

### Is 日本地理クイズ 楽しく学べる教材シリーズ free?

日本地理クイズ 楽しく学べる教材シリーズ costs $3.99, with no in-app purchases.

### Is CosmicObserver free?

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

### Do 日本地理クイズ 楽しく学べる教材シリーズ or CosmicObserver have ads?

Neither 日本地理クイズ 楽しく学べる教材シリーズ nor CosmicObserver shows ads.

### Which is updated more often, 日本地理クイズ 楽しく学べる教材シリーズ or CosmicObserver?

日本地理クイズ 楽しく学べる教材シリーズ ships an update every 4 months, and CosmicObserver every 5 weeks. Most recently, 日本地理クイズ 楽しく学べる教材シリーズ was updated on September 21, 2026 and CosmicObserver on September 11, 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.*