We build apps
you want to keep close.
OnCommit is a one-person app studio based in South Korea. We think about people before technology, and we commit honestly, one change at a time.
About OnCommitJalga eSIM
"Jalga" is what Koreans say to someone leaving on a trip: take care, have a good one. When an order comes in, our server wakes up every minute, issues the eSIM and sends the install link, so travelers are connected the moment they land.
Mosim
Mobile invitations for weddings, first birthdays, parties and funeral notices, made in five minutes without signing up. Photos and videos are deleted automatically 90 days after the event. The memories stay; the data doesn't.
Korea Ready
A "what to know before you arrive" guide for visitors to Korea: airport transport, T-money, eSIM, payments and city guides in English, Japanese and Traditional Chinese. All 54 pages are generated from a single data source.
ApplyTalk
Korean public housing lottery notices and schedules, an eligibility score calculator, per-complex communities and AI consultation in one place. Started in 2021, paused, and rebuilt in 2026.
Live
CardNex
Digital business card exchange for networking events. Swap cards by QR code; every exchange raises your networking score on the event leaderboard.
Live
Tagonabom
OnCommit's first mobile app, now preparing for release on Android and iOS.
Coming soon
Saju
Traditional Korean four-pillars astrology. The calendar math is computed in-house and covered by tests, since it must never be wrong; the reading is written by AI and cached so the same chart always gets the same text.
In development
On (溫), warm. Commit, a promise.
"On" is the Korean word for warmth. For developers, a commit finalizes a change, and it is also, literally, a commitment. The more AI builds for us, the more we want to keep the promise of adding a little warmth to the day of the people who use our apps.
Questions, proposals and bug reports are all welcome.
Email [email protected]