So you've decided a smart switch or plug really is what you need. Now the question is, which one should you get? In-wall switches, like Belkin WeMo Light Switches or Lutron Switches, are convenient because toggling them is as natural as hitting a normal light switch. Plus, you get the added smarts of remote control, scheduling and automation.
That means if you have light fixtures you want to automate, but you want to keep their normal wall-switch control too, then in-wall smart switches are what you need.
Smart plugs, like the iDevices Switch, offer many of the same features, but also increased flexibility, as you can plug in whatever device you want.
Read more: http://www.cnet.com/news/smart-switch-buying-guide/