That's where Passbook or similar facilities come in handy. No app to start. Just touch the item as presented even on a locked screen based on time and other factors that are pre setable.
Now, if only Amtrak reservations made by phone (such as Guest Rewards sleeper redemptions) could be brought into the Amtrak app, and therefore into Passbook...
I think we'd all like that. Don't know why. Such a ticket could always be "locked" so you had to modify it by phone instead of via the app if that's their concern.
That's not their concern Frensic. And I think that Amtrak would love to be able to provide what you guys are requesting. The issue is that ARROW can't handle it. Online booking, App stuff, and AGR are all really overlays sitting on top of ARROW. They all know things that ARROW doesn't and ARROW doesn't have the ability to pass that information around. At least not without a major rewrite, which no one wants to do and at this point no one may even really be capable of doing it without risking bringing down the entire system.
I fear that the only way that this may happen is if/when Amtrak finds the money to actually replace ARROW with something more modern.