Mentioned in our report:Steadicam Smoothee
This handheld device helps stabilize a mobile phone to produce smoother shots. The universal smartphone mount works with the various sizes of Android and iPhone models. A separate mount is available for GoPro HERO cameras.
https://tiffen.com/steadicamsmoothee/ Filmic Pro Mobile Video
$9.99 for Android, $14.99 for iOS
This smartphone camera app enables manual adjustment of exposure, ISO, shutter speed and color settings. It also has sophisticated audio controls that include visual audio meters and support for stereo microphones.
http://www.filmicpro.com GoPro Karma Grip
Handheld stabilizer for GoPro cameras.
https://shop.gopro.com/stabilization GoPro Karma Drone