HomeKit accessories are things such as lights, thermostats, and locks that you deploy around your home.

This indicates that you’re free to connect and control the accessory with your Home app.

(To learn more about HomeKit, seeEverything it’s crucial that you Know About Apple HomeKit.)

3 screenshots from Apple Home app on iPhone: (left) Main Home screen, showing device status squares, (center) Add accessory, with camera scan option, (right) Living Room detail screen, showing two lamps and a HomePod

To add a gear, open your Home app and tap+in the upper right corner, then tapAdd accessory.

Some devices require an additional bridge to get to work with HomeKit.

In some cases, you use a manufacturers app to add an accessory.

3 screenshots from iPhone Home app: (left) thermostat adjustment controls, (center) lamp brightness at 100%, (right) color selector circle for lamp

Tap on the displayed square in the Home app to access additional controls.

Tap a thermostat, then adjust the temperature control range.

Tap a light, then adjust a slider to control brightness, adjust color, or other parameters.

3 iPhone Home app screenshots: (left) new scene options, with 4 suggested scenes shown, (center) Good Night scene details, to turn everything off, (right) Bedtime custom scene that turns some lights off, and others on

You may then apply a command to every item in the room.

For example, you might add four different lights into a Room named “Living Room.”

Or, you might identify that you have lights, outlets, and a fan in your home office.

3 iPhone Home app screenshots: (left) Main automation screen, showing 2 automations, (center) New automation options, based on people arriving/leaving, time, accessory control, or sensor, (right) Sunrise automation detail to turn on porch light

(Learn more about rooms and scenes inGetting Started with Apple HomeKit Devices.)

you’ve got the option to also make adjustments to sets of Home accessories.

Home App Automation

Automation allows you to program certain things to occur automatically.

3 iPhone screenshots: (left) Eve Degree weatherstation chart of temperature, humidity, and air pressure over time, (center) Philips Hue scene lighting default options (e.g., Savanna sunset, Arctic aurora, etc.); (right) HomeKit & Siri settings in Philips Hue app (shows Lights, Accessories, Rooms, Scenes, and Advanced menus)

Depending on your security choices and options, you also may be able to remotely control door locks.

The app also serves as a way to update Hue machine firmware.

Third-party apps often sync data with the Home app.