You can buy the Junior card, and then use it till the day before she turns 16…
Once she turns 16 she is an adult.
Note that:
- The Swiss Travel Pass comes with the Family card. No need to buy the Junior card. However, again, only for children…
- The Family Card/Junior Card only give free travel when an adult with a valid ticket or pass accompanies the child. It does not allow your daughter to travel for free on her own.
There is a Swiss Travel Pass Youth, which would work for your Daughter. Or maybe you do not need the Swiss Travel Pass at all, and you are better off with another product.