LightIntheBox offers this
Smart Remote Control WiFi Outlet Plug for
$8.99 with
free shipping. (Select "Postal Service - No Tracking" at checkout.) That's the lowest price we could find by $2. It can be controlled via iOS and Android mobile devices or with voice control via Amazon Alexa and Google Home. It can be scheduled to power on at specific times and features an away mode to turn lights on randomly to make it appear your home isn't vacant.
Note: This item ships from China and may take up to five weeks to arrive. Uncheck "Add Shipping Insurance to your order" during checkout to remove the 49-cent fee.