Aoputek via Amazon offers the Koogeek Wi-Fi Smart Plug for Apple HomeKit in White for $29.99. Coupon code "RNEFXGY7" cuts it to $20.99. With free shipping, that's $3 under our April mention and the lowest price we've seen. (It's the best deal now by $14.) It allows scheduling and timers for electronics and appliances via your iOS device using Siri, monitors energy consumption and provides reports, and can control multiple items with a single voice command.