# 키즈토리 STEP 3 vs MU

The clearest difference is review sentiment: MU at 24% against 키즈토리 STEP 3's 10%. MU also leads on iOS requirement (8.0 vs 12.4). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 7, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | 키즈토리 STEP 3 | MU |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 10.0% of reviews | **24.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free | Free |
| Size | 97 MB | 226 MB |
| Requires iOS | 12.4 | **8.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chunjae Education.Inc.](https://appshunter.io/developer/428912179) | [(주)뮤엠교육](https://appshunter.io/developer/1213307689) |

## What reviewers say

### 키즈토리 STEP 3

[App page](https://appshunter.io/ios/app/step-3/id1209415807)

This app makes early Korean history fun and engaging for young children through 3D animations, craft activities, and traditional songs. It helps children explore historical sites and understand the wisdom of ancestors, fostering creative thinking.

**Highlights:** 3D animation history exploration, Interactive craft activities, Traditional songs and games, Understanding daily life connections, Curriculum-aligned learning

**In-app purchases:** none


### MU

[App page](https://appshunter.io/ios/app/mugo-ar/id1213307690)

This app uses augmented reality to make learning English fun for children. It allows kids to interact with animated characters and learn through engaging AR experiences, supplementing their classroom education at home.

**Highlights:** Augmented reality English learning, Interactive character engagement, Home supplement for classroom education, AR-powered interactive lessons, Child-friendly learning experience

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 키즈토리 STEP 3 free?

키즈토리 STEP 3 is free to download, with no in-app purchases.

### Is MU free?

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

### Do 키즈토리 STEP 3 or MU have ads?

Neither 키즈토리 STEP 3 nor MU shows ads.

### Which is updated more often, 키즈토리 STEP 3 or MU?

키즈토리 STEP 3 ships an update monthly, and MU monthly. Most recently, 키즈토리 STEP 3 was updated on October 7, 2026 and MU on October 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*