If a device is turned on, then start to preheat your oven

HomeSeer lets you automate and control your door locks, thermostats, lights and more from anywhere with your phone or tablet. Note that a MyHS Plus subscription is required.
Smart Life provides extraordinary experience with your smart home appliances, including smart plugs, smart lights, air conditioners, humidifiers... As long as your device works with Smart Life, you'll be able to build automation tasks through IFTTT like turning on the living room light when you're back home.