Quick add: type !high, !low, today, tomorrow, a weekday, 15/11 or #project in a task title. Shortcuts on a computer: N new task, / search, Esc close or leave focus mode. Drag the dotted handle to reorder; on a phone, swipe a task right to complete or left to delete.
Export saves every project, task and subtask to a JSON file. Import reads a backup file back in.