I bought the app two weeks ago and when I tried to use it, was the worst experience I had. to put the remote in F mode , there were about 2 seconds between the order I gave and the action being undertaken by the drone . The worst was when you try to use the tracking function . I put fingers to select the object ( as explained in the tutotrial ) and when I was already in the crosshairs of the camera simpre had a freeze and debaja to follow. that is, whenever I try to follow the drone camera and I turned to locate in the center of the image. always at the time of this movement he was suffering a freeze image and turning left to drone . After a second image back but the app would select another object automatically . I could not use the app , for me it was a robbery. I am not happy.