Tickets purchased via your smartphone are personal and non-transferable and are only valid in conjunction with a valid form of ID belonging to the person travelling (passport, identity card, driving licence). If you have a Half Fare/GA Travelcard, this is also a valid form of ID.
If you have a travelcard on the SwissPass and have bought a ticket that is linked to it, you can simply show the ticket in the app. The prerequisite for this is that you are logged in with the SwissPass login and were also logged in at the time of purchase. Once you’ve done this, there’s usually no need to show your SwissPass card.
Important: If you can’t get an online connection while your ticket is being checked, you must show your SwissPass or another official form of ID if requested to do so by the inspector.