# 코인(Koreatech In) vs 두둥링크

The clearest difference is iOS requirement: 두둥링크 at 12.0 against 코인(Koreatech In)'s 17.0. 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.

코인(Koreatech In) ships an update every 2 weeks, 두둥링크 monthly. The most recent releases landed on September 15, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | 코인(Koreatech In) | 두둥링크 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Size | 44 MB | 29 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [BCSD Lab](https://appshunter.io/developer/1500848621) | [NPLEY Co., Ltd.](https://appshunter.io/developer/1741470465) |

## What reviewers say

### 코인(Koreatech In)

[App page](https://appshunter.io/ios/app/koreatech-in/id1500848622)

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

**In-app purchases:** none


### 두둥링크

[App page](https://appshunter.io/ios/app/dudunglink/id6497652638)

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

**In-app purchases:** none


## Frequently asked questions

### Is 코인(Koreatech In) free?

코인(Koreatech In) is free to download, with no in-app purchases.

### Is 두둥링크 free?

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

### Do 코인(Koreatech In) or 두둥링크 have ads?

Neither 코인(Koreatech In) nor 두둥링크 shows ads.

### Which is updated more often, 코인(Koreatech In) or 두둥링크?

코인(Koreatech In) ships an update every 2 weeks, and 두둥링크 monthly. Most recently, 코인(Koreatech In) was updated on September 15, 2026 and 두둥링크 on September 10, 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.*