So you would like to use your smartphone to capture immersive video? The VRkit has you covered. It comes with an app and Rotator to let you create 720 degree VR images at 8K resolution. The rotator is portable and Bluetooth enabled. A lens is also available to help you record crisp shots.
theVRkit stitches your images and saves you from having to use other external equipment. You can find out more about it here.