Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.Delta has had an iPhone app for a while now, though they just added upgrade list functionality and so far so good. I am actually writing this post from the LAX SkyClub as I wait for my JFK flight and I’ve used the new feature and am impressed so far (though I’m not happy at my current spot on the upgrade list).First thing I had to do was update the app in the App Store:Then, once checked-in:-> View my trips -> Click on your itinerary -> Upgrade - View ListI like how it shows names so you can see where your traveling companions also stand. Overall, I’m liking it so far and it’ll save me from opening up my laptop or trying to load delta.com on my iPhone, which always takes a while.I’d love for the iPhone app to allow me to same day confirm to other flights automatically. What types of things would you like to see in an airline app?