D-Day Application is a mobile app for devices running on Apple iOS. It is used to track the number of days until a set event occurs, the number of days after an event has occurred, and the number of days an event or activity has been in progress. For instance, it can be used to track the number of days until the user’s next birthday, how many days it has been since the user’s last cigarette, and how many consecutive days the user has been on a diet. This day-tracking tool may be used in monitoring health, in planting cycles, doing laboratory work, and in other applications where counting the days is necessary. For example, those who have a goal to finish a project in a certain number of days can use this app to track their progress.
The app interface is simple and user-friendly. Users only need to enter a date on one of the tabs. If it is a future event, the app will show the number of days left until the event. If it is a past event, the app will show how many days it has been since that date. The app enables users to customize the title of the day they are tracking; the events may also be added to the calendar app that is already installed in the mobile device.