IMO people should not have to know a company’s policies and go through their website to make a purchase. Anyway, it would have been nice if they put that information on the sign in their pickup area, or their pickup reps or desk clerks mentioned it when I told them I didn’t have the app. Instead they made it clear that everyone should either already have the app or install it because they said so.
Way, way too many companies and organizations (like the OP’s) are pulling this kind of crap.