Hi sharonl
Yes, correct.
The ticket fares shown on sbb.ch/en and in the SBB Mobile app are by default half fare as most of the Swiss residents are in possession of a Half Fare Card.
When you buy all tickets with one single account, you can add your family members as co-travelers and activate the half fare check-box with them as well. This way, the tickets are always half fare, or short: ½.
Let us know, should you need further information.
Best regards,
Roland