Daymark

Daymark is a D-Day app for people who frequently check important dates.

You can save events you don't want to miss, such as exams, trips, anniversaries, project deadlines, and ticket sales, and quickly check the remaining time. You can designate your most important event as the main D-Day so it appears first on the home screen and widget.

The display method naturally changes as the event approaches. When it is far away, you can simply view it as a D-number, and as it gets closer, you can check it in more detail in days/hours, hours/minutes, or minutes/seconds. Events within 24 hours are displayed as large numbers in Imminent Mode.

You can save notes, locations, and links along with each event, allowing you to open them immediately when needed. You can manage both default and custom notifications, and the main D-Day is simply displayed on the home screen widget.

Daymark focuses on quickly checking important dates rather than showcasing a multitude of features. The free version may include low-frequency interstitial ads, which can be removed with a one-time purchase if desired.