There are already plenty of garage door openers on the market that can be controlled via an app. The Genie Aladdin supports Alexa and Google Assistant too. It is a WiFi enabled garage door opener that gives you the ability to open/close your garage door and check its status from anywhere.
This kit ships with a door position sensor. You can control up to 3 garage doors with this. Aladdin Connect lets you put your garage door on a schedule and add up to 19 virtual key users. It sends you notification on your smartwatch or smartphone when the status of your garage door changes.