Your iPhone is more than capable of acting as an action camera with the right tools. The Velocity Clip iPhone Helmet Mount lets you use your phone to capture POV videos on the go. It ships with a tripod compatible smartphone clamp and 2 sticky mounts (curved & flat). You can put these stickies on your motorcycle helmet, skateboard, bike, or anywhere else to get creative with your camera.
The Velocity Clip has the 1/4″ – 20 tripod adapter, so you can fix it to standard tripod threads. Costs under $40 at this time. More information is available here.