So you would like to put your USB powered devices on a schedule? The Thanko USB 24-Hour Timer Switch has you covered. It lets you turn on/off the power at any one-hour interval up to 24 hours later. You can use it with your smartphone, USB fan, and other comparable devices.
Why would you even need something like this? To keep your devices from overheating or reducing energy waste. Sets you back under $30 at this time.