Well, my 2nd flight with the spark using the OTG cable with my iPad, in airplane mode, and my Spark just dropped out of the sky from about 100 feet. The screen on the app went blank, it still said it was in flight, and I heard the crash in front of my house. Battery was over 75% charged and I had a clear line of site to the drone from the side of my house. This thing, while I love the size, is a BIG P.O.S. I should've kept my Mavic. Now I am going to have to pay for the refresh, get a new one and return to Amazon. Unreal.