Apps other than the Go app

[NH Phantom]

Do any of you use an aftermarket app other than go app? If so what do you use and what is safe meaning reliable? looking for something I can set waypoints.

 

[The Editor]

Do any of you use an aftermarket app other than go app? If so what do you use and what is safe meaning reliable? looking for something I can set waypoints.

Please use the search function as this has been covered numerous times.
Apps like Litchi, Autopilot etc have been debated ad nauseum.

Thank You.