Here is another rig that lets you use your smartphone like a pro camera. The Viewflex VF-H7 Smartphone Rig lets you add a light and microphone to your set up. A detachable Bluetooth remote control for video shooting is also included.
The VF-H7 comes with a hot shoe mount. The smartphone clamp fits devices 54mm to 95mm wide. The VF-H is compatible with iOS and Android devices.