BTS
Meet RM, Jin, SUGA, j-hope, Jimin, V and Jung Kook. Compare all seven birth-date charts, or start with your bias.
Find my BTS match →KOREAN SAJU × YOUR FANDOM
Your bias.
Your chemistry.
Is your bias also your chart match? Pick a group, enter your birthday, and find out — just for fun.
Find my K-pop match ↗Free · In English · No login01 / PICKChoose your group02 / MATCHEnter your birthday03 / SHARECompare with friends
YOUR DAILY FANDOM RITUAL
A little wish for your bias
A fresh daily theme. A letter worth keeping. Choose a member and save them as your bias for tomorrow.
Find your fandom or bias
10 groups · 66 idols · birthdays checked 2026-09-19
BLACKPINK
Explore JISOO, JENNIE, ROSÉ and LISA. Find your chart match across all four members, then compare with your favorite.
Find my BLACKPINK match →Stray Kids
Eight self-producing members — Bang Chan, Lee Know, Changbin, Hyunjin, Han, Felix, Seungmin and I.N. See which STAY bias shares your chart.
Find my Stray Kids match →SEVENTEEN
Thirteen members across three units. Compare your birth-date chart with every one of them, from S.Coups to Dino.
Find my SEVENTEEN match →TWICE
Nine members from Korea, Japan and Taiwan. Check your chemistry with NAYEON through TZUYU and see your full ONCE ranking.
Find my TWICE match →TOMORROW X TOGETHER
SOOBIN, YEONJUN, BEOMGYU, TAEHYUN and HUENINGKAI. Find which TXT member your birth-date chart echoes.
Find my TOMORROW X TOGETHER match →ENHYPEN
JUNGWON, JAY, JAKE, SUNGHOON, SUNOO and NI-KI — the six members promoting today. Compare all six with your birthday.
Find my ENHYPEN match →NewJeans
MINJI, HANNI, HAERIN and HYEIN — the four members promoting as NewJeans today. See which chart is closest to yours.
Find my NewJeans match →aespa
Karina, Giselle, Winter and Ningning. Four charts, one ranking — find your MY bias match.
Find my aespa match →IVE
GAEUL, YUJIN, REI, WONYOUNG, LIZ and LEESEO. Compare your birthday with all six and share the result.
Find my IVE match →A LITTLE CONTEXT
What is a K-pop saju match?
Saju is a Korean birth-chart tradition. This fan experience compares the year, month and day of two birthdays using traditional element and day-branch relationships. It is a conversation starter, not evidence about an idol’s personality or feelings.
How is the score calculated?
We compare day elements (supporting +3, same +1, contrasting −2), day branches (harmonizing +3, opposing −2, otherwise 0), and missing elements supplied by the other chart (three or more +2, one or two +1). The total, from −4 to 8, is mapped to 0–100. A score is an entertainment index, not a percentage chance.
Do I need a birth time or an account?
No. Birth times are unverified, so hour-pillar elements are excluded for both you and the idol. The engine uses noon to resolve the calendar date. Only the Gregorian birth date is used; gender is not part of these matching rules.
Is my birthday shared?
Your existing Toolwyn profile birthday can prefill the form. Lunar profiles are converted to Gregorian dates. Edits made here stay in memory while you browse K-pop and do not change your saved profile. Your date is processed in your browser. Shared images contain the selected idol and score, but no birthday. Challenge links open the idol’s page so your friends can get their own results.
Why do several members have the same score?
These traditional rules have a limited set of outcomes. Ties are expected and receive the same rank. A lower score means a different symbolic combination, not that you are a worse fan or incompatible in real life.