So you would like to capture smoother video on your iPhone? The Movi from Freefly has you covered. It pairs with an iPhone app and supports Timelapse and other smart modes for pro video. The device has a two-handed form factor and extra-wide pinch clamp. You also get a 1/4″-20 mount for your tripod and other gear.
The companion app lets you control the robot and adjust its settings. In Majetic mode, you can rely on Movi to stabilize your movements when you capture moving targets. The Echo mode allows you to teach the device new moves.[Source]