The app is designed to work in both orientations on iPad and iPhone, but works best in landscape. In landscape mode on larger devices the app operates in a “split-view” way with a left and right panel. The left panel acts as a master pane showing the titles of the lists that have been created. The right panel acts as a detail pane and shows the current list.
On smaller devices, the master and detail panels are shown separately. Navigation from the master to detail panel occurs on the selection of a list.
In portrait mode on larger devices, the master pane can partially cover the left side of the detailed view, and can be shown or dismissed by swiping across the screen left-to-right or right-to-left respectively. Depending on orientation and iOS device type, the top left of the detail view panel might have a button that reveals the master pane.