Hello MikeT
Nice to read that you will visit our country.
You cannot transfer tickets to another SBB Mobile app, yet you can forward the a screenshot of the ticket’s QR code to others, for example in your family chat.
The Swiss Half Fare Card and the Swiss Travel Pass cannot be displayed in the SBB Mobile app, you will have to show them as part of the PDF from your device, or as printed hard copy. The latter is always useful.
Keep in mind that everyone has to show their physical passport together with the tickets upon ticket inspection.
Let us know should you have more questions, we gladly assist you.
Kind regards,
Roland