D-day Counter - Countdowns

Never miss a day that matters. D-day Counter keeps every countdown in your life — exams, anniversaries, birthdays, deadlines — organized in one clean app.

Made for you if…

• You're a student counting down to a final exam, certification test, or interview

• You want to celebrate your 100th or 1000th day together as a couple

• You never want to forget a family member's or friend's birthday — even one kept on the lunar calendar

• You're tracking a project deadline, trip departure, or any big day ahead

Key features

1. Unlimited D-days

Create as many countdowns as you want — no limits. Pick an emoji and add a memo to make each one yours. Count down to upcoming days (D-35) or count up from past events (D+82).

2. Reminders

Get notified on the day, or 1, 2, 3, 7 or 30 days before — at the time you choose.

3. Home screen widgets

Check your D-days right from your home screen. Pick which D-day each widget shows; with a start date it shows a progress bar too.

4. Yearly repeating events

Birthdays and anniversaries roll over automatically every year. Set it once and it always shows the next occurrence.

5. Lunar calendar dates

Enter a date on the Korean lunar calendar and it repeats on that lunar date every year, with the solar date worked out for you. Leap months included.

6. Statistics

Year progress, what's coming up, your next 100th or 1000th day, goals in progress and a by-month chart — all on one screen.

7. Calendar view

See all your D-days laid out on a monthly calendar. Instantly know what's coming up this month.

8. Categories

Exam, Anniversary, Birthday, Military and Other — rename them, change their icon and color, or create your own.

9. Progress ring

Set a start date and watch the progress ring fill up as you approach your goal.

10. Backup & restore

Export your D-days to a file and bring them back on a new phone.

Light and private

• No sign-up — start using it the moment you install

• All data stays on your device (nothing is sent to a server)

• Works fully offline

• Dark and light themes, English & Korean supported

From exam countdowns to couple anniversaries and birthday reminders — start counting the days that matter with D-day Counter.