For questions, bug reports, feedback, or feature requests, please contact us by email.

Support email: [email protected]

When reporting an issue, please include your device model, operating system version, app version, and a description of what happened.

Frequently Asked Questions

Q. How do I continue studying on another device? On the home screen, use "복습 기록 > 다른 이름으로 저장" (Study progress > Save As) to save a file to a location such as iCloud Drive or Google Drive. On the other device, open that file with "열기" (Open). If "자동 저장" (Auto-save) is on, your progress is saved to the file every time you study.

Q. I tapped the wrong button. Gently shake your phone on the study screen to undo your last answer.

Q. What is the red text next to the meaning? It is a hint shown when several English words share the same Korean meaning. For example, (q5) means the word starts with "q" and has 5 letters. See "소개" (About) in the app for details.

Q. How do I start over from the beginning? Tap "복습 기록 > 새로 만들기" (Study progress > New) to clear your progress and start again. To keep your current progress, save it first with "다른 이름으로 저장" (Save As).

Q. When does a new day start? A new study day starts at midnight.