I've been using Gopro with Karma gimbal on my handlebar for videos and used my Cellphone to take pictures. Gopro's voice command worked well and the Karma gimbal was attached to my handlebar using Gopro mount so quite easy to take it off and film using your hands if needed.

I mounted the Gopro on the top of my handlebar at the beginning of the tour, but I ended up mounting it under the handlebar later





Also, I can always double-click the power button to access the camera apps so I never really had to unlock my phone.