The D-Day countdown app'D-Day Keep', first released on Google Play on April 21, 2025, has come to iOS. CodeSand Co., Ltd. announced that it launched D-Day Keep on the App Store on May 26, 2026, and is now offering the service on both Android and iOS.
D-Day Keep is an app that counts the days left automatically every day once you register days you do not want to forget, such as anniversaries, birthdays, exams and trips. It also counts days that have already passed, so dates that are already behind you, such as the day you started dating or the day you were born, can be used as they are.
Dates kept as cards
Each date gets its own title, icon and color, and is shown as a card. Adding a photo as the background keeps the memory of that day too, and gradient themes can change the look of a card.
Home screen widgets and notifications
The days you want to see most often can be pinned to a home screen widget, so you can check them without opening the app. Notifications can be set not only for the day itself and the day before, but also for every 100 days and for anniversaries, so even if you forget about a date for a while, the app reminds you when the time comes.
Your data stays on your device first
All features of D-Day Keep can be used without signing up. The dates you register and the photos you add are stored on your device and work even without an internet connection. Users who want to keep their records when changing devices can sign up with a Kakao, Google or Apple account and turn on cloud backup, and they can delete their account at any time. The app currently supports 14 languages, including Korean.
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About CodeSand Co., Ltd.
CodeSand Co., Ltd. is a web service and mobile application developer founded on May 30, 2023. It runs its own services alongside contract development, and its business registration number is 368-87-03020. Company information is available at codesand.co.kr.
Media Inquiries
CodeSand Co., Ltd. Public Relations · pr@reply.codesand.co.kr
