Four Pillars Match – BaZi

Four Pillars Match reads two birth charts and scores how well the pair fits — then shows you exactly where that score came from. Instead of a vague "you two get along", it breaks the result into four factors and tells you how many points each one added or subtracted. Every reading you keep lands on a single map, so you can see who sits in which direction and how close they are.

■ Who it is for
· Anyone curious about a partner, a crush, or a long-term relationship
· Couples checking their match before a wedding
· People who want to understand the grain of a friendship or family tie
· Business partners wondering whether they will actually work well together
· Anyone who wanted the people around them gathered on one page
· Anyone interested in BaZi who found the vocabulary intimidating

■ What it does

1. Relationship map — everyone on one page
You sit at the centre and everyone you have read is placed in the direction of their own Day Master element. The higher the score, the closer to the middle. As the map fills up the circles shrink to points of light; pinch out and names and scores come back — so there is no cap on how many people it holds.

2. Branching — anyone on the map can be the centre
Pick someone already on the map and add their connections underneath, scored against them rather than you. Narrow a busy map with focus and depth.

3. Six relationship types, scored differently
Dating, crush, marriage, friends, business and family each weight the chart differently. Romantic readings lean on the day branch (the spouse palace); business readings lean on day-master elements and elemental balance. You get a 0–100 score with a grade from A+ down to D.

4. Score breakdown — the reasoning is visible
· Day Master elements: whether the two stems generate, match or control each other
· Day Branch (spouse palace): Six Harmony, Triad Harmony, Clash, Punishment, Break, Harm
· Year Branch (zodiac sign): the same branch relations, scaled to 0.65
· Balance: whether you supply the elements the other lacks, and how the month and hour branches cross
Every factor shows its signed contribution (+32, −8) with a one-line explanation.

5. Five Elements cycle diagram
Both day masters are placed on the Wood–Fire–Earth–Metal–Water pentagon, so you can see at a glance which way the generating and controlling cycles run between you.

6. Built-in glossary
Around a hundred terms — Ten Gods, Heavenly Stems, Earthly Branches, the five elements, harmony and clash relations — each with a plain one-line description. Tap any unfamiliar term straight from the result screen.

7. Saved history, searchable
Saving is one action: the reading lands in your history and on the map together. Search by name, filter by base person or relationship, sort by date or score. Copy a text block with both charts to paste into a chat model, or export the history to a file.

8. Configurable calculation
Turn the hour pillar off when the birth time is unknown, and switch the weighting preset to read the same chart from another school's angle. The exact weights are in the "How scoring works" screen.

■ About the accuracy
· Month pillars are set by solar terms, with the start of spring as the year boundary
· Lunar birth dates supported, leap months included
· Day and month pillar math verified against Korea Astronomy and Space Science Institute reference values
· Rule-based and deterministic — the same input always gives the same result. No AI guesswork, nothing sent to a server.

■ Light and private
· No sign-up — open it and start
· Birth details and everyone on the map stay on your device and are never uploaded
· Works without an internet connection
· English, Korean, Japanese, Spanish and Chinese (Simplified & Traditional), light and dark themes

See where you two flow together and where you push against each other.

※ Readings are an entertainment and reference feature based on traditional Four Pillars theory. They do not assert facts or predict the future.

Recent changes:
Fixes a launch screen that could hang, and starts the person form the same way everywhere.

· The launch screen no longer waits forever when the update check stops responding.
· The launch icon keeps the size and place of the system splash, so nothing jumps.
· The launcher icon and the launch screen now use one artwork.
· The add-person and my-chart sheets no longer open with "time unknown" on.
· Gender starts on the left chip everywhere, and an empty birth time saves as unknown.