# Guiin Book - Who's My Guiin? — Saju for your relationships

> Saju for your relationships (iPhone/iPad app by Essential Corp..)

- Source: https://appshunter.io/ios/app/guiin-book-whos-my-guiin/id6807344045 (this page in markdown: same URL + `.md`)
- Developer: [Essential Corp.](https://appshunter.io/developer/1704120372)
- Category: Entertainment, Social Networking
- Price: Free
- Age rating: 12+
- Requires: iOS 15.0 · 8 MB
- Languages: Korean, American English, Japanese, Chinese (Traditional, Taiwan)
- Released: 2026-09-29
- Data updated: 2026-10-24

## What is Guiin Book?

What kind of connection do you have with the people around you?

GUIIN BOOK is a relationship collection powered by Saju, helping you discover the meaning of your connections with the people you actually know.

Add friends, partners, family, and coworkers to see how each relationship feels and what makes each connection unique.

The same relationship can look different from each side. Compare how you see someone with how they see you, and explore the people around you on your Relationship Map.

Discover Guiin — people who may have a special influence on your path — and gradually fill your own Guiin collection.

In Groups, enjoy shared relationship rankings, daily questions, birthdays, good days to meet, and more with your friends.

Share a relationship result with someone and continue by seeing your connection from their point of view.

A new way to discover people and explore the relationships around you.
Find your connections in GUIIN BOOK.

## Is Guiin Book safe?

Not enough ratings yet to assess Guiin Book.

## Is Guiin Book legit?

Guiin Book - Who's My Guiin? appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Guiin Book is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.0.2 — 2026-10-02

- You can now upload a profile photo.
- Fixed an issue where push notifications weren't being delivered.
- Fixed other minor bugs and made general improvements.

### 1.0.1 — 2026-09-29

No release notes.

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## More apps by Essential Corp.

- [퓨어슬립 - 수면 리듬 형성](https://appshunter.io/ios/app/id6759944757)
- [자람 - 우리 아이 발달 도우미](https://appshunter.io/ios/app/id6783736874)
- [토닥 - 부모 목소리로 듣는 동화](https://appshunter.io/ios/app/id6796534929)
- [미:묘](https://appshunter.io/ios/app/id6813548147)

All apps by Essential Corp.: https://appshunter.io/developer/1704120372

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-24.*