Amazon offers Prime members the iDevices Switch WiFi Smart Plug for $23 with free shipping. That's $2 under last week's mention and the lowest price we could find by $13, although you'd expect to pay at least $50 in local retail stores. Via the free iDevices Connected app, this switch features energy monitoring, remote access, and on/off scheduling. It also features voice control via Amazon's Alexa, Siri, or Google Assistant.