TomTop offers the Koogeek Wi-Fi Smart Plug for Apple HomeKit in White, model no. BE-P1CA, for $34.99. Coupon code "TTLTP2 " cuts that to $23.99. With free shipping, that's tied with our December mention and the lowest total price we could find by $11. 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.
Note: The countdown timer on the product page does not reflect an actual expiration time and resets daily.