FlightTrack and FlightTrack Pro had been our Travel Department's (TD) go to phone app for flight tracking and flight alerts. It had a great widget, did excellent real-time in-flight tracking, and was simple to use. Alas, no more take offs or touch downs for FlightTrack and FlightTrack Pro. You can get a refund if you bought the Pro version (send an email request to email@example.com). Needing tracking alerts today, I scrambled this morning to find a free flight tracking app, tried out several, and settled on Flight Companion. It is simple to use and automatically sets default alerts, makes customization easy through its simple settings, and seems to track all flights world-wide including flights to small airports. As it turns out, I like it better than I did FlightTrack. There are unobtrusive ad offers, but you can eliminate them for a fee of $5, and I was so happy with the app, I did just that.
Link to Flight Companion on Play