We are going to do a one day Disneyland trip next Friday. We were there last year but I just wanted a reminder of how to use the app. Can we purchase our park hoppers on the app? How does that work as far as using it the first time we go through the turnstiles? What about each time we enter the park? Can everyone be on my phone? Then I can add max pass once we’re in the park? We’ve never done a one day trip before so this is a bit different for us! Thanks!