# 헤어핀 HAIRPIN vs MY CLIENT BOOK

The clearest difference is ads: MY CLIENT BOOK at none against 헤어핀 HAIRPIN's shown. 헤어핀 HAIRPIN's advantage is update cadence (every 2 days vs every 4 days). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

헤어핀 HAIRPIN ships an update every 2 days, MY CLIENT BOOK every 4 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | 헤어핀 HAIRPIN | MY CLIENT BOOK |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 4 days |
| Size | 129 MB | 31 MB |
| Requires iOS | 16.4 | 16.4 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Chanho Hwang](https://appshunter.io/developer/1596846406) | [Hyeonseo Shin](https://appshunter.io/developer/6813559619) |

## What reviewers say

### 헤어핀 HAIRPIN

[App page](https://appshunter.io/ios/app/hairpin/id6777420253)

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

**In-app purchases:** none


### MY CLIENT BOOK

[App page](https://appshunter.io/ios/app/my-client-book/id6813757697)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 헤어핀 HAIRPIN free?

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

### Is MY CLIENT BOOK free?

MY CLIENT BOOK is free to download, with no in-app purchases.

### Do 헤어핀 HAIRPIN or MY CLIENT BOOK have ads?

헤어핀 HAIRPIN shows ads; MY CLIENT BOOK does not.

### Which is updated more often, 헤어핀 HAIRPIN or MY CLIENT BOOK?

헤어핀 HAIRPIN ships an update every 2 days, and MY CLIENT BOOK every 4 days. Most recently, 헤어핀 HAIRPIN was updated on October 31, 2026 and MY CLIENT BOOK on October 31, 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.*