1.Add a task
2.Show on-going tasklist(s)
3.Delete a task
4.Update/Edit a task
5.Check/Tick to complete the task, upon complete, the task will be removed from "on-going tasklist(s)"
6.Show completed/history task(s)
A. You may add a deadline to a task which enables the app to:
1.Add a date and time for the deadline to a task
2.App can show an indicator if the task is due (pass the deadline)
B. You may add a sub-task to a task which enables the app to:
1.Add a sub-task to task
2.Edit, Delete a sub-task
3.Check/Tick to complete the sub-task
4.If all sub-task is ticked/completed, the main task will show completed status
5.You may add progress status in percentage for the main task based on sub-task status
