GoodTask has 3 main areas. One is 'Lists' which shows Smart Lists and Reminders Lists. Next is 'Tasks' which shows tasks in one certain list. On the right is 'Task Detail' page where it shows details about selected task.
Swiping on 'Tasks'
On 'Tasks' area, you can switch between 4 types of views. List, Day, Week and Month views. When you swipe on 'Date area' on top of tasks, you'll move to previous/next dates on Day/Week/Month views. When you swipe tasks, you can run actions which can be set on 'Settings - General - Swipe on Task'.
Long tap to move data (Drag and drop)
On both 'Lists' and 'Tasks', you can long tap an item to move it up and down. On 'Lists', you can add groups and spaces to adjust them as you'd like. On 'Tasks', when you move your tasks, it'll dynamically change according to your 'Sort Options'. You can drag and drop multiple tasks into lists.
GoodTask for iOS 3.6 Update (Smart Button, Drag and drop & more)
GoodTask for macOS 3.6.1 Update (Better drag and drop)
If you tap '...' button on top right, you'll get additional options. You can choose 'Bulk Actions' to edit/complete/delete multiple tasks at once. Also you can change 'Sort Options' and share or edit the list.
You can pull down to search tasks. Results will come up as you type. If you choose a task, list will change accordingly to show the task. You can change pull down option inside 'Settings - General - Pulling Action'
macOS version is divided into 3 areas. Lists are shown on left pane. Tasks are shown on mid pane. Details of task are shown on right pane. Left/right pane can be hidden with top left buttons or CMD-L/CMD-D.