Powered by the Expedia API, TripAssist lets users receive free, real-time flight status updates to any flight, whether you need to pick up your mother-in-law (can't be late!) or are traveling yourself. Status alerts are free even if you didn't book a flight with Expedia. We also like that the app easily auto-syncs itineraries from your Expedia account and allows users to connect to multiple Expedia accounts at the same time.