Starting this April, United Airlines is rolling out a new personal device entertainment system onboard select aircraft.

With this new service, sponsored by the MileagePlus Explorer Card, you can choose from over 150 movies and nearly 200 TV shows and watch them free of charge on your personal device such as an iPhone or iPad. The free entertainment will be made available through the airlines’ own iOS app, which can be downloaded for free.
   
Most planes will be equipped with the new system soon. United says it have it installed on most domestic aircraft by the end of 2014. The airline will begin on Airbus A319, Airbus A320, Boeing 747-400 and select 777-200 aircraft, followed by additional fleets. In the end, all United-operated flights will have some form of entertainment.