Let me be more specific then, as to which variables that must be entered into the specific device in order to obtain a valid ballistic solution.
Rianov: High valid range info must be obtained by a rangefinder, as I assume the rangefinder will be more accurate than the built in ranging function. Wind data - velocity and direction - must also be entered.
Kestrel AB: High valid range info must be obtained from a rangefinder. In addition, the slope angle must be entered into the device for a valid ballistic solution.
: Wind data must be entered in order to obtain valid ballistic solution.
The Rianov and Kestrel units are "generic" as they provide bullet path output which is executiable by any scope.
The G7 BR2 output is "ballistic range equivalent", which is best executed with a scope that has a custom turret for the ammo used.
I hope this clears up any confusion.