I was watching a YouTube video in which the Mavic Pro owner had a crash. He does not rule out pilot error but he contacted DJI just in case. DJI tells him they will not warranty crashes when a third party app is used. Which is understandable because apparently telemetry is not stored by third party apps. He then asked for a list of approved apps. DJI responded by saying only DGI Go 4 is approved for use. They apparently will not cover a crash even if the DJI GS pro is used!?! Check out his video for more detail.