Saju Letter: Daily Korean Saju

MIKOMARU

In-app purchases

About this app

Every morning, one short letter arrives — written just for you, from the year, month, day and hour you were born.

Saju Letter is built on Korean saju (사주), the Korean branch of the four pillars tradition (a close cousin of BaZi). Where a zodiac sign describes a fixed type, saju reads how your own birth chart meets each calendar day — which is why it can be a new letter every morning instead of the same paragraph for everyone.

WHAT YOU GET
• A new letter every morning, sized for a coffee break — no jargon, no doom, no "lucky numbers"
• Write back: leave a note about your day and Dain, your letter writer, replies the same day
• Tomorrow's letter remembers what you shared
• Compatibility with a friend, one link away — they don't need the app to see the result
• A monthly calendar with the month's mood, and an archive of every letter you've received
• A weekly letter and a month-end letter that look back on your own weeks
• Available in English, Spanish, Japanese and Korean

FREE AND PREMIUM
The morning letter is free, every day. Premium ($3.99/month or $39.90/year, 7-day free trial) unlocks the full letter, the reply-and-remember journal, the weekly and monthly letters, the calendar and the archive. Invite a friend and you both get extra days.

HOW IT'S MADE
Your saju is calculated by code, not by an AI — so nothing about your chart is invented. An AI only turns the already-computed reading into plain, kind language, under strict rules: no predictions, no medical, legal or financial advice.

A NOTE
Saju Letter is for reflection and entertainment. It is not a substitute for professional advice. Ages 16 and up. Your birth date and time are encrypted and never shared.

Free preview with no sign-up: saju-letter.com/en