hello! Lennart from Sweden here. New in the droneworld,but modelflyer since 30 year ago. I have just bougt a P3 advance,but this one is after first flight backway to seller,got compasse error in the app,something is wrong with the drone... However,i bougt another drone in a forum here i Sweden. A P3 4k. Can i use the same app and same iPad to both drones?? Or must i have for exemple My iphone6 and a new app for one of them??