There are plenty of smart switches and plugs that let you control your appliances from your smartphone. Not all of them are easy to use though. The Switchmate happens to be an innovative solution that sits over your light switch using magnets and lets you control your lights and fans using your smartphone. There is an optional hub available to let you control your lights from anywhere.
The Switchmate is easy to install and does not require any rewiring. It lets you put your lights on a timer. The companion app runs on iOS/Android devices. You can find this project on Indiegogo.