I am going to try and preorder through the mobile app this go around. When going to the app on my iPhone 5, I went to account settings to try and turn / toggle on express pay. However - unlike on my MacBook/website; I don't see any options to turn on express pay in my account options. All of the information is there - it just doesn't appear to be on as all items still have "add to cart" in blue and are not showing up as "buy now" in green. Can someone help me figure out how to turn it on via the iPhone app? Your help is appreciated..