Stuff like this should always have an analog failsafe like a printable ticket. I can’t be the only one who has a phone actually die out and about. Especially as this device gets a little old, battery drops maybe 1% every 2 min of screen on use. Even worse in crowded cell service situations like baseball games.
EDIT: I know complaining about downvotes is a downvotable offense itself, but I'm genuinely curious as to what is objectionable about this comment.