App allows to carry out following operations.

1. Project plan
2. Create project (when clicking Top-left side of menu bar icon)
3. Create a new task or task group(write main/.sub/..sub task at once, when clicking red write button)
4. Edit or delete Selected task or task group(when long clicking or clicking edit button)
5. Create unlimited hierarchy task tree viewer
6. highlight task name color/bold/italic(when long clicking or clicking edit button)
7. move selected sub tasks within its task group by drag & drop(in edit mode, when clicking left icon)
8. Expand or collapse sub tasks
9. Hashtag, Searching

[1.3.3]
- Support Android 10 compatibility
[1.3.1]
- Show keyboard by default to input window (Android P)
[1.3.0]
- Improvement: Support white color and advanced color picker
- New option: App Info > Dark mode
- New option: Task list > Hide fast scrollbar(to avoid mistake when create sub-task)
- New option: Completing the task > When the sub-task is unchecked, uncheck the parent task
- New options: Data management > Recover sticky notifications