# 엠도씨 vs J4U

The clearest difference is update cadence: J4U at every 2 weeks against 엠도씨's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

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

엠도씨 ships an update every 4 months, J4U every 2 weeks. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 엠도씨 | J4U |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Size | 16 MB | 89 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MdoC Co., Ltd.](https://appshunter.io/developer/1488048955) | [Kyung Hwan Im](https://appshunter.io/developer/1627779557) |

## What reviewers say

### 엠도씨

[App page](https://appshunter.io/ios/app/mdockorea/id1109958948)

**Features:** macOS Compatibility

**In-app purchases:** none


### J4U

[App page](https://appshunter.io/ios/app/j4u/id6763212355)

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

**In-app purchases:** none


## Frequently asked questions

### Is 엠도씨 free?

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

### Is J4U free?

J4U is free to download, with no in-app purchases.

### Do 엠도씨 or J4U have ads?

Neither 엠도씨 nor J4U shows ads.

### Which is updated more often, 엠도씨 or J4U?

엠도씨 ships an update every 4 months, and J4U every 2 weeks. Most recently, 엠도씨 was updated on October 29, 2026 and J4U on October 28, 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.*