It's not perfect, but Chamberlain's myQ smart garage door opener is the best option for most people.
The GarageMate Garage Door Remote Control and App is an ultra-simple and affordable garage door opener that you control from your smartphone, but other openers such as the Chamberlain MyQ and Nexx have many more features.
While setup is a bit tricky, Garadget provides a secure way to open your garage door using your smartphone.
The Nexx Garage smart garage door opener offers a solid array of useful features with loads of functionality built into the app, once you can get through a frustrating setup process.
The Nest Thermostat E is an attractive and relatively affordable smart thermostat, and it's also one of the easiest to use.