Here is a filmmaking cage for iPhone that lets you capture video with your microphone and lights and wirelessly charge your device. It comes with 3 cold shoes on top and a 1/4″ tripod thread at the bottom, so you can mount your phone to a tripod, slider, or jib conveniently.
The ULANZI U Rig Wireless has a spring-loaded design to accommodate phones from 4.92″ to 6.94″. It has handles on both sides to give you a secure grip. This iPhone rig also has a 15W wireless charger built-in.