I made this design to allow me to follow my teams/zoom calls using my company iPhone (12) from anywhere. The design accommodate for attaching to horizontal as well as vertical elements. (See the attached manual with A or B modes)
The only thing you need that can't be printed are 10 magnets with a 10mm diameters and 3mm thickness.
I am also preparing another design that replaces the magnetic system with the quad lock system soon.
The author hasn't provided the model origin yet.