Yes. You can purchase multiple tickets through the app that can be used by yourself and your travel companions.
When preparing to board, activate all the tickets needed by your party.
When multiple tickets are active, a row with dots will appear at the top of the ticket. Each dot represents an active ticket. You navigate through the tickets by swiping left or right.
As you swipe, a white dot and text will indicate which ticket is currently displayed.
Ticket 1 of 3 is being displayed