For those using iPhones I would recommend Variflight-Live on Time app. It is free.

It has the flight tracking function that allows users to check real-time flight status, incl. :

---time of arrivals and departures

---take-off time

---landing time

In addition, it displays airport weather and time table info, aircraft type and age.

Download link: https://itunes.apple.com/us/app/id1198164839?mt=8