Simple in its design, Kenu's Airframe Portable Car Mount ($25) replicates the functionality of much more complex accessories. The small plastic and rubber mount is made to hold any iPhone or iPod touch, in or out of a case, thanks to its expandable grasp. Four rubber arms on the back of a rotating disc can fit into any car air vent to mount a device. Kenu also says you can put a credit card between the arms to make a desktop stand.