Hello Hawraa
You can change the reduction under «My Settings» and «Travelers» or in the step «Ticket Option». Please click on «Edit travelers». The reduced price is not automatically calculated even if the SwissPass is registered in the app SBB Mobile.
Please note that the price of the saver day ticket is constantly changing. It depends on how many day tickets have already been purchased for that day. The starting price of 29 francs is only available for a very short time.
I wish you an excellent start into the week.
Regards RahelW