
Guiin Book - Who's My Guiin?
Saju for your relationships
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About
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.
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What's New in Guiin Book
1.0.2
October 2, 2026
- 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.
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