# 우연MCS KEY vs 아이오트 i

The clearest difference is update cadence: 우연MCS KEY at every 2 months against 아이오트 i's every 15 months. 우연MCS KEY also leads on iOS requirement (11.0 vs 14.0). 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.

우연MCS KEY ships an update every 2 months, 아이오트 i every 15 months. The most recent releases landed on November 7, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | 우연MCS KEY | 아이오트 i |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 15 months |
| Size | 25 MB | 215 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Guangzhou Kuodao Internet of Things Technology Co., Ltd.](https://appshunter.io/developer/1196125665) | [주식회사 엠에이치씨엔엠](https://appshunter.io/developer/1739016633) |

## What reviewers say

### 우연MCS KEY

[App page](https://appshunter.io/ios/app/mcs-key/id6449514476)

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

**In-app purchases:** none


### 아이오트 i

[App page](https://appshunter.io/ios/app/i-oteu/id6480434584)

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

**In-app purchases:** none


## Frequently asked questions

### Is 우연MCS KEY free?

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

### Is 아이오트 i free?

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

### Do 우연MCS KEY or 아이오트 i have ads?

Neither 우연MCS KEY nor 아이오트 i shows ads.

### Which is updated more often, 우연MCS KEY or 아이오트 i?

우연MCS KEY ships an update every 2 months, and 아이오트 i every 15 months. Most recently, 우연MCS KEY was updated on November 7, 2026 and 아이오트 i on November 12, 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.*