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