What is HomeKit?
The short answer
HomeKit is Apple’s built-in system for controlling smart home devices like lights, thermostats, and locks from your iPhone, iPad, Mac, or Apple Watch.
How it works
HomeKit connects all your compatible smart home gadgets into one place — the Home app that comes pre-installed on every Apple device. Instead of juggling five different apps for five different brands, you control everything from a single screen.
You can also use Siri to control your devices with voice commands like “turn off the living room lights” or “set the thermostat to 72.”
What you can control
- Lights — turn on, off, dim, or change colors
- Thermostats — adjust temperature from anywhere
- Door locks — lock and unlock remotely
- Cameras and doorbells — view live feeds on your Apple devices
- Plugs and switches — control any device plugged into a smart outlet
What you need to get started
- An iPhone or iPad with the Home app
- A smart home device that says “Works with Apple HomeKit” on the box
- A home hub (Apple TV, HomePod, or iPad left at home) if you want remote access and automations
The home hub is what lets you control things when you’re away from your house. Without one, you can only control devices while connected to your home Wi-Fi.
Automations and scenes
HomeKit lets you set up automations — rules that trigger actions automatically. For example:
- Turn on porch lights at sunset
- Lock the front door when everyone leaves
- Turn off all lights at bedtime
Scenes let you control multiple devices with one tap. A “Good Morning” scene could turn on the kitchen lights, start the coffee maker, and set the thermostat — all at once.
Should you use it?
HomeKit is a good fit if you’re already in the Apple ecosystem. It’s private by design — your data is processed locally and encrypted end-to-end.
The main downside is that HomeKit supports fewer devices than Amazon Alexa or Google Home. However, the Matter standard is closing this gap, since Matter devices work with all three platforms automatically.