AI-native product studio

Multiful LLCAI that makes lifea little better.

An AI-native studio started by a serial founder from the global internet industry.

Reading your saju. Checking in on a parent. Climbing a mountain. We take things people already do and make them a little better with AI.

See our productsOur approach
Incorporated in Delaware
2025
Live now
Unnie Saju · HERNAME
English · 한국어 · 日本語
3 languages

01—Products

What we make

What you can use today, and what comes next.

Unnie Saju
LiveKorean saju, read by AI

Unnie Saju

A relationship map, not just a score.

Your saju from your birth date. The chemistry between you from just their birthday. Anything else, ask Unnie. A Korean Four Pillars app, read by AI on the traditional manseryeok calendar.

Korean Four Pillars, manseryeok-based · Five languages — EN, KO, JA, TH, VI · Android and web

What it does

  1. 1A full reading from your birth date
  2. 2Compatibility from just their birthday
  3. 3A full couple reading, shared through an invite link
  4. 4Ask Unnie anything, in conversation
View Unnie SajuOpen Google Play
Free on Connect IQGarmin Watch Faces

HERNAME

A dress watch on your wrist. Your body's signals, quietly.

Analog watch faces for Garmin, designed in Seoul. A deep black dial and slim polished hands, with Body Battery, stress, heart rate, weather and VO₂ max set into the dial rather than over it. Two layouts: HERNAME, with curved gauges around the inner ring, and HERNAME CHRONO, with three chronograph subdials.

  • Body Battery, stress, heart rate, weather, VO₂ max
  • Battery-friendly Always-On mode
  • Round AMOLED Garmin watches — fēnix, epix, Forerunner, Venu, vívoactive and more
  • Free, no ads, no data collection
Get HERNAMEGet HERNAME CHRONO
HERNAME and HERNAME CHRONO analog watch faces on a black dial

In the works

What comes next

Planned for March 2027

Anbu

AI care for parents who live far away

An AI that calls your parent every day and keeps them company. It tells you when something in their days changes — so distance no longer means not knowing.

  • Daily calls, initiated by the AI
  • Long-term memory across conversations
  • Change signals for the family

In development

ibeen

Every summit and run, on one card

A hiking and running app that records your route and turns your own photo into a share card — the path, your stats, and badges for the peaks you have climbed. Courses and GPX files are shared on the web.

  • Share card: your photo, route, stats and badges
  • Badges for Korea's 100 famous mountains
  • Course pages and GPX download on the web
  • iOS and Android

02—Approach

Built with AI. Finished to a human standard.

Multiful is AI-native: we plan, build and run with AI at every step, which lets a small team make more than one product. The time that saves goes where people still have to decide — the tone, the pace, what to show and what to leave out.

01

Start from what people already do

We don't invent new habits. We take ones people already keep — reading their saju, calling a parent, climbing a mountain — and make them a little better.

02

A little better, for real

No grand promises. We choose small problems that stay with people — like not knowing how a parent far away is doing — and check whether their day actually got better.

03

Finished, then refined

We ship when it feels finished, not when it merely works — and keep refining after launch.

03—Company

Multiful at a glance

Founded
January 2025Delaware LLC
Live
Unnie SajuHERNAME
How we work
AI-nativeRemote-first
Contact
help@multiful.ai

So far, and next

  1. 2025

    Founded, first launch

    • Multiful LLC incorporated (January)
    • Unnie Saju launched (December)

  2. 2026

    A second product

    • HERNAME on Garmin Connect IQ (October)
    • ibeen in development (since September)

  3. 2027

    Planned

    • Anbu, planned for March

04—Team

Who makes it

A small team building with AI — and always open to the right people.

Steve Woo

Founder & CEO

Steve Woo is a pen name. A hacker turned developer turned serial founder. The face stays out of frame; the products carry the signature.

How we work

AI-native, remote-first and asynchronous — and it stays that way as the team grows. The company is a Delaware LLC.

New members are always welcome

We don't wait for a job post to meet good people. If you build things yourself, work naturally with AI, and care how things feel as much as what they do, say hello.

Say hello

05—Questions

Frequently Asked Questions

About Multiful

  • Multiful LLC is an AI-native product studio, incorporated in Delaware in January 2025. It builds AI services and products that make things people already do — reading their saju, checking in on a parent, climbing a mountain — a little better.

  • Two products. Unnie Saju is a Korean saju app that reads your chart and your compatibility from birth dates with AI, on Google Play and the web. HERNAME is a free analog watch face for Garmin's round AMOLED watches. In development: Anbu, AI care for parents who live far away (planned for March 2027), and ibeen, which turns hiking and running records into share cards.

  • Steve Woo, Founder & CEO — a pen name. The person behind it is a former developer and a serial founder across the global internet industry, and leaves the introductions to the products. A small team builds with AI around that, and new members are always welcome.

  • We plan, write code and run our products with AI at every step. That is how a small team ships more than one product, and it frees our time for the parts people still have to decide. The company is a Delaware LLC and works remote-first.

  • Write to us through the form below or at help@multiful.ai. We look at each partnership on its fit with the product, and we're always glad to talk to people who build things — job post or not.

  • Please check the Unnie Saju support page first. If that doesn't solve it, email help@multiful.ai.

Still have questions?

Ask us anything.

Get in Touch

06—Contact

Get in Touch

Products, partnerships, joining us — write to us about anything.

Let's Start a Conversation

Whether you use Unnie Saju or HERNAME, have something to build together, or want to join, we'd like to hear from you.

Email Us
For general inquiries and partnerships
help@multiful.ai
Product Inquiries
Questions about Unnie Saju, HERNAME and our other products
help@multiful.ai
Company
Delaware LLC, USA · Remote-first
multiful.ai