Ever wanted to have a camera crew follow your every move? The iPhone Swivl from Photojojo does just that. Thanks to a motion-tracking iPhone base and a wearable, three-in-one sensor, you can shoot videos with smooth panning and crystal-clear audio — in other words, none of those jumpy, headache-inducing shots you might see when the phone's in your hand. Here's how it works: the base receives signals from the sensor, which serves as a motion-tracker, a microphone, and a remote. From there, the base can rotate or tilt up and down to follow the sensor.Although the Swivl operates on its own, it also has a free companion app that lets you customize the panning speed. Even cooler? As long as your digital camera or Android phone weighs in at less than six grams and is under 11 millimeters thick, you can use those devices on the Swivl too.