Here is another affordable iPhone video rig that lets you capture video and photos with your smartphone like a pro. The Rizer Stabilizer Rig brings more stability to your shots. It ships with 2 dimmable LED lights for low light conditions. You can also mount your external microphone to it.
This video rig has a convenient Bluetooth camera shutter. It is compatible with smartphones from 4 to 7 inches. You can find out more about it here.