# 두두 vs 스마트 체크인

The clearest difference is review sentiment: 스마트 체크인 at 100% against 두두's 50%. 두두's advantage is iOS requirement (11.0 vs 15.1). 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.

두두 ships an update every 4 days, 스마트 체크인 weekly. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 두두 | 스마트 체크인 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Weekly |
| Monetization | — | Free |
| Size | 58 MB | 30 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Juyeon Yu](https://appshunter.io/developer/1499305185) | [Hoyeong Kim](https://appshunter.io/developer/1705580723) |

## What reviewers say

### 두두

[App page](https://appshunter.io/ios/app/id6449709551)

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

**In-app purchases:** none


### 스마트 체크인

[App page](https://appshunter.io/ios/app/id6758745455)

This app streamlines visitor and user check-ins through a contactless experience on tablets and kiosks. It replaces manual logs with quick QR code scanning or simple on-screen input for efficient entry management.

**Highlights:** Contactless check-in via QR code or touch input, Optimized UI for kiosks and tablets, Real-time data synchronization with servers, Supports vertical and horizontal screen orientations, Efficient entry management without queues

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 두두 free?

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

### Is 스마트 체크인 free?

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

### Do 두두 or 스마트 체크인 have ads?

Neither 두두 nor 스마트 체크인 shows ads.

### Which is updated more often, 두두 or 스마트 체크인?

두두 ships an update every 4 days, and 스마트 체크인 weekly. Most recently, 두두 was updated on October 22, 2026 and 스마트 체크인 on October 24, 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.*