Meet the Ulanzi CG01 Bluetooth Smartphone CapGrip II: an iPhone grip that lets you hold your phone with less shake one-handed. It comes with a detachable remote shutter with a range of 33ft. It has a 1/4-inch screw and cold shoe for attaching your microphone and light.
The Ulanzi CG01 can be easily attached to your tripod. It has a small mirror that you can use to make sure you look good on camera.