Selected Work

Products with clear utility, polished UX, and launch-ready details.

A focused portfolio of apps and web products designed, built, and operated by L CUBE YOO.

Android & iOS App

LumiSync: Jet Lag Planner

Science-based schedules for light exposure, sleep, meals, and local reminders when crossing time zones.

Android App · Coming soon

Handwriting math practice for Grades 1–6. Kids write each answer by hand, recognized on-device — no ads, no trackers, no account required.