I’ve been using Delta app for a while now and I’ve been amazed with its rich functionality and user experience. A few years back my flight got canceled due to weather issues and the app automatically suggested alternative flights and booked me on the best alternative I choose, this was super convenient and at the heart of fabulous user experience that every other app aspires to be. Another great feature I love is the upgrade status which automatically initiates if you’re eligible for complimentary upgrades based on your tier status or other criteria. All the basic features like booking flights using cash or miles, flight status, digital boarding pass, etc. is super easy. Although I was not lucky enough to get an upgrade for this trip but I liked the way the app tracked it. Overall I’ve not seen any other airline app which is so intuitive and user friendly so kudos to the Delta team.