I bought this to go on my push bike handlebars and it is a great idea but when I put my iPhone 13 in the specified holder it locks back and forth, also the ball joint smooth when I go over bumps I do not want to make them any tighter because I am afraid of breaking the plastic.
Like I said great idea - needs work to be used in an unstable environment. I have now replaced it with a much cheaper phone holder which works great.