Horrible app. The customer support is the worst experience I had in my life. They don't have a phone number, only email. I simply wanted to change my flight and already selected all the changes and confirmed the change. What followed was a 3 day back and forth where they offered completely unrelated flights on unrelated dates, multiple times did the person I was emailing with change and I had to start all over and in the end the flight was 200 dollars more since it was 3 days later!