I plan to purchase my Swiss half fare card on (Thursday, Aug. 15th) online using the SBB app during my 3 hour layover at Frankfurt Airport before arriving in Zurich and train to Luzern the same day. I've read that I will receive an email showing my purchase and I can print the pass or save to my Apple Wallet. How long will it take for the pass to show up in my email or the SBB app? Is it instantly or would it be safer to purchase at the ticket office in Zurich?
I know I'm waiting till the last minute but we will only be in Switzerland for 6 nights and with air travel (from USA) I want to be sure I'm actually in Europe first.
Thank you in advance for your help. Karen