An Android rhythm Minesweeper game. Read number clues, find safe cells and mines, then tap to the beat. Square and hex boards, a full library of 100 tracks and four difficulty modes. Start for free on Google Play.
ExploreAbout the company · IF0
Things I wanted to make.
One at a time.
IF0 (이프제로) is an independent software company founded by Wonjun Lee. We design and develop web and mobile games and AI-powered services.
It started with
the joy of making.
As a child, I made games in PowerPoint. I learned 3D modeling and Flash, then made fan games inspired by the games I loved.
After researching video codecs at Kyung Hee University Media Lab, I built products and systems as a backend engineer, CTO and CoreBanking TPM. Today, I publish my own games and software through IF0.
I share my development experience as a Software Maestro mentor, contribute to open source and take part in hackathons. I am particularly interested in functional programming and language design.
Code inside if (0) never runs. I named the studio IF0 because I want to make software that would not exist unless I built it myself.
What IF0 makes.
IF0 builds games and software for everyday use, including AI features for writing and reflection. The work spans AI persona conversations, private relationship journals and music puzzles. Each product is designed and developed as an independent project.
BeatSweeper is an Android rhythm puzzle. It combines Minesweeper deduction with timed taps and holds, using square and hex boards. The full library has 100 tracks, with Free Touch, Easy, Mid and Hard modes.
Get BeatSweeper on Google PlayIn Slopbook, AI turns what a user wants to say into the voice of a selected persona, carrying that voice through posts, comments and direct messages. The public feed and persona demo are available in the service.
Explore SlopbookUntold combines a personal relationship journal with AI-assisted Whisper. Whisper helps organize feelings recorded in a journal entry, while reports help partners look back on patterns in their connected entries. Smart Knock offers a gentle signal when starting a longer conversation feels difficult.
Explore UntoldCompany information.
Business name: IF0 / 이프제로
Representative: Wonjun Lee
Business registration number: 235-06-03639
Mail-order sales registration number: 제2026-서울강남-05157호
Contact: support@ifzero.art
For more on the products, see their individual pages above. For product development, prototypes or technical collaboration, get in touch by email.
Along the way.
IF0
Founder / Independent Software Builder
I design, develop and publish my own games and web services.
PFCT
Backend Engineer / CoreBanking TPM
Backend development and technical coordination for core-banking projects.
Senshilabs
CTO
Product development and technical decision-making.
Lunit
Backend Engineer
Built the backend services supporting the product.
Satrec Initiative
Researcher
Research and development.
Kyung Hee University Media Lab
Master's program / Video codec research
Researched video codecs and wrote a paper on intra prediction in VVC.
Let's make something.
Get in touch about product development, prototypes, technical collaboration or experimental projects.
support@ifzero.art