# Why? 과학 vs 한글 여행앱(AR)

The clearest difference is in-app purchases: 한글 여행앱(AR) at none against Why? 과학's 11. 한글 여행앱(AR) also leads on device support (3 vs 1). Why? 과학's advantage is iOS requirement (6.0 vs 15.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Why? 과학 sells 11 one-off in-app purchases. 한글 여행앱(AR) asks for nothing beyond the download.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on September 27, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Why? 과학 | 한글 여행앱(AR) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/why/id433116895/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free | — |
| Size | 15 MB | 590 MB |
| Requires iOS | **6.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [(주)예림당](https://appshunter.io/developer/565049166) | [BAE JIN HO](https://appshunter.io/developer/1496509423) |

## What reviewers say

### Why? 과학

[App page](https://appshunter.io/ios/app/why/id433116895)

This app makes complex science topics easy and fun for children through engaging comics and vivid illustrations. It aligns with elementary school science curricula, making it a great study aid. Continuous content updates ensure an ever-growing library of scientific exploration.

**Highlights:** Engaging comic format, Vivid illustrations and real photos, Curriculum-aligned content, Expert-reviewed science information, Continuous content updates, International export success

**Features:** macOS Compatibility

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Why 우주 | $5.99 | one-time |
| Why 인체 | $5.99 | one-time |
| Why 바다 | $5.99 | one-time |
| Why 곤충 | $5.99 | one-time |
| Why 사춘기와 성 | $5.99 | one-time |
| Why 공룡 | $5.99 | one-time |
| Why 똥 | $5.99 | one-time |
| Why 외계인과 UFO | $5.99 | one-time |
| Why 독있는 동식물 | $5.99 | one-time |
| Why 응급처치 | $5.99 | one-time |
| Why 전기전자 | $5.99 | one-time |


### 한글 여행앱(AR)

[App page](https://appshunter.io/ios/app/ar/id1496509424)

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

**In-app purchases:** none


## Frequently asked questions

### Is Why? 과학 free?

Why? 과학 is free to download, with in-app purchases available.

### Is 한글 여행앱(AR) free?

한글 여행앱(AR) is free to download, with no in-app purchases.

### Do Why? 과학 or 한글 여행앱(AR) have ads?

Neither Why? 과학 nor 한글 여행앱(AR) shows ads.

### Which is updated more often, Why? 과학 or 한글 여행앱(AR)?

Why? 과학 ships an update monthly, and 한글 여행앱(AR) monthly. Most recently, Why? 과학 was updated on September 27, 2026 and 한글 여행앱(AR) on October 3, 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.*