That's fair enough, I'm a total newbie and haven't even flown my spark yet as it was delivered yesterday and won't get chance until tomorrow.
From what I've read because I'm using the iphone 7plus I'm better off as the wifi connection is better so should be able to do away with the need of an OTG. I have also purchased the parabolic antenna cups in the hope that it'll produce a better stable connection. I'm only going to start off with begginers mode before I move on to further flying and then it'll be in wider open spaces in the counryside so hoping to push to the 400m mark.