๐Ÿ—“๏ธ Local-first D-Day countdown app

D-Day Keep

Every day that matters, at your fingertips

Anniversaries, birthdays, exams, trips. Every important day in a D-Day countdown, at a glance โ€” and on your home screen widget, every single day.

Free ยท Start without sign-up ยท 14 languages

What D-Day Keep does for you

Only what you need, just enough.

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D-Day Countdown

Birthdays, anniversaries, exams, trips. Register any date and we'll count the days automatically. Tell them apart at a glance with icons and colors.

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Photos & themes

Add a photo to your D-Day background and the memory comes with it. Pick a gradient theme to make a card that's truly yours.

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Home widget

See your D-Days every day on the home widget, without opening the app. Pin the one that matters most.

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Smart alerts

On-the-day, day-before, 100-day, and anniversary alerts so you never miss a moment. We'll even remind you if you've been away a while.

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D-Day Share NEW

Share a special day with friends and partners via a link or story image. They can add it to their own D-Days in a single tap.

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14 languages

Available in 14 languages. Use it anywhere, in your own language โ€” wherever life takes you.

NEW

Count the moments, together

Your 100 days as a couple, a friend's exam, a family birthday. Share a D-Day with a single link and the other person counts down the same day โ€” and adds it to their own with one tap.

codesand.co.kr/app/dkeep/s/โ€ฆ

How it works

Three steps are all it takes.

1

Add a D-Day

Pick a date you want to remember and set the title, icon, and color. Past or future, anything goes.

2

Customize & notify

Add a photo or pick a theme for a card that's truly yours. Turn on D-100, 1-year, and same-day alerts.

3

Pin to home screen

Pin your most important D-Day as a home widget. See it naturally every day without opening the app.

Local-first, sign-in optional

Your data on your phone. Back up only when you want.

๐Ÿ”“ No sign-up required

Add D-Days and upload photos freely without signing up. All data stays on your phone and the app works even offline.

โ˜๏ธ Sign in for secure backup

Sign in with Kakao, Google, or Apple to back up your data to the cloud and restore it on a new phone. Delete your account anytime.

Contact

support@codesand.co.kr


ยฉ 2026 CodeSand Co., Ltd.