Once you login the controller is bound to the quad, if the quad flys away and is found it can only be used with a new controller 5 times before you have to login and change it which requires the original login details
as for being bound, anyone...
Its a security aspect, if the drone is stolen then it stops the thief from using the drone once the login expires, which in itself is a good idea,
And if they get stolen then they can be sold on.
Hi
I wrote a tool for this that is easy to use download and install to the set directory then just click the relevant button
https://github.com/Judslat/NewGimcal
Nope just the original controller
Yes a lot of people have had issues with the go4 app and the newer iphones and ipads, mainly i guess because the app was written for a much earlier IOS version, that said i cant get the latest version to work...