# 두둥링크 vs 블루체크

The clearest difference is update cadence: 블루체크 at every 4 days against 두둥링크's monthly. 두둥링크's advantage is iOS requirement (12.0 vs 15.1). 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.

두둥링크 ships an update monthly, 블루체크 every 4 days. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | 두둥링크 | 블루체크 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Size | 29 MB | 74 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [NPLEY Co., Ltd.](https://appshunter.io/developer/1741470465) | [TripleAuth](https://appshunter.io/developer/1812844883) |

## What reviewers say

### 두둥링크

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

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

**In-app purchases:** none


### 블루체크

[App page](https://appshunter.io/ios/app/sns/id6755992194)

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

**In-app purchases:** none


## Frequently asked questions

### Is 두둥링크 free?

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

### Is 블루체크 free?

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

### Do 두둥링크 or 블루체크 have ads?

Neither 두둥링크 nor 블루체크 shows ads.

### Which is updated more often, 두둥링크 or 블루체크?

두둥링크 ships an update monthly, and 블루체크 every 4 days. Most recently, 두둥링크 was updated on November 8, 2026 and 블루체크 on November 5, 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.*