D-Day의 모든것 - 음력지원 is an excellent app developed by GBAlright for Android users. The app is designed for managing important dates such as anniversaries, birthdays, and special events. With the app, you can easily keep track of your D-Day list with support for the lunar calendar and leap year.

The app comes with several features that help you manage your D-Day list efficiently. You can view your D-Day list for up to 3000 days before or after the event. The app also supports a dual calendar system, allowing you to view both the lunar and solar calendars simultaneously. Additionally, the app comes with a calculator that helps you calculate how many days are left until the event. You can also edit or delete the events on your list with ease.