D-Day Counter · Days Until / Since
No sign-up: just a title and a date. Everything stays on your phone. Free on Android, in English and Korean.
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Why a 100th day shows as +99, baby milestones, adding months to a date, exam countdowns, Korean age, Korea’s 2026–2027 holidays, legal deadlines, repeats on the 31st, spreadsheet formulas and lunar birthdays.
No sign-up: just a title and a date. Everything stays on your phone. Free on Android, in English and Korean.