New iPhones all ship with a Lightning cable. You can use that cable to charge and sync your device. I personally find docks more useful. They hold the phone and charge it for you. There are plenty of expensive iPhone docks available on the market. The Bluelounge Rolio is not expensive and turns your Lightning cable into a portable wall dock. It is pretty simple to use. All you have to do is roll the cable around the center of Rolio, thread the USB end through the center of the spool and plug it into your Apple adapter.
The Bluelounge Rolio is compact and quite helpful. It holds your iPhone and charges it. Best of all, it does not take a whole lot of space. You can pick one up for $9.99.