last Saturday i went trainwatching and the Fly app was giving me fits every other time i flew. it kept crashing and coming back up. I put the drone up early before the train came we was waiting on and right when it was time to snap pictures the photo and video buttons disappeared and i couldn't switch to camera and take a picture. so i missed my shot. i was pissed. Then in the same flight it showed i was 6 ft off the ground even though i was about 70 feet and the return to home buttons was disappeared also. So i landed manually. then later when it was time to take off for the next train the take off button was gone and I had to close out the app and reopen it. almost missed my shot then too. Also have been having problems for the last month where quite often the app stays at the startup screen and after a minute or two it goes to the fly screen by then i missed the train. so now i figured out when it hangs and won't go to fly screen i have to close out and reopen. also sometimes i get a message saying it can't connect to the GPS or something or another to close the app out and reopen it. I'm so sick of this BS. then for another train the app crashed and left me at the home screen in the middle of a pacing scene with a train. i was flying at 15 mph and then couldn't' see where i was flying it screwed up my shot.