Problems with times

Its currently 16:55, my parents flight is scheduled to land at 18:50. According to the app, theyre "landing in 4 hours at 19:50". Last I checked 16+4 is not 19; even if the eta is wrong.
Deleting it and looking for something more useful and accurate.

Eva Airam about Flight tracker, Plane Radar 24, v3.4.1