AirDog is an interesting "follow me" drone that is in its commercial infancy. It was designed to use GoPro cameras to film persons involved in "adventure sports". AirDog in "auto-follow" mode follows whoever is wearing its programmable "Air Leash" e.g. around the wrist or on a helmet.
See AirDog | The Auto-Follow Drone For Adventure Sports.
The AirDog drone is currently selling for $1599 without the camera. See the AirDog Shop.
We find that the "Air Leash" (which can be worn e.g. on the wrist or on a helmet) could be a considerable improvement over the other "follow me" drones which require that the user carry around a large control apparatus that the drone can be set to follow.
The negative side of all of these "follow me" drones thus far is the limited flight time, which is 10 to 18 minutes for AirDog, which is below the 20 or more minutes that can be achieved with e.g. a Yuneec drone.
We expect improvements to be made here in the future, with battery weight apparently being the main problem, so that manufacturers may have to learn to integrate the battery better into the structure of the drone and perhaps use larger or better batteries.