Apple has released an open-source version of its HomeKit Accessory Development Kit (ADK), following news that it is joining a new industry effort to create an open standard for smart home devices.

homekit devices
On Wednesday, Apple, Amazon, Google, and the Zigbee Alliance announced the formation of a new working group that plans to develop and promote the adoption of a new IP-based connectivity standard for smart home products, with a focus on increased compatibility, security, and simplified development for manufacturers.

In a news post on its developer website, Apple said the release of the open-source ‌HomeKit‌ ADK is designed to accelerate development of the new universal smart home standard:

To accelerate the development of the new universal standard, Apple is open-sourcing portions of its HomeKit Accessory Development Kit (ADK). HomeKit has grown to become the most extensive, powerful and secure smart home platform available on more than a billion iOS and iPadOS devices. Built from the ground up to protect customer data, HomeKit and the Home app use innovative privacy technologies and techniques to help minimize the amount of data anyone — including Apple — can access as well as powerful security features that protect personal information. By open-sourcing its HomeKit technology, Apple will be helping to jump-start the initiative and ultimately deliver an even better experience to customers.

The release of the ADK means anyone can start developing non-commercial smart home accessories and even build ‌HomeKit‌ devices for their own home, while accessory manufacturers can use it to test products before officially joining the ‌HomeKit‌ MFi program, which can be a time-consuming process, not to mention an expensive undertaking.

Apple says it will contribute its ‌HomeKit‌ Accessory Protocol to the new consortium, and noted that anyone planning to sell HomeKit-compatible accessories must use the commercial version of the kit supplied by the Apple MFi program. The company also confirmed that existing ‌HomeKit‌ accessories will remain compatible with the new protocol when it's eventually released.

To access the ‌HomeKit‌ Open Source ADK, visit www.github.com/apple/HomeKitADK.

Top Rated Comments

Janschi Avatar
70 months ago

Well that’s good.. I think? I’m not a developer: can anyone explain how will this help the platform?
The companies decided to come up with a standard protocol to make all smart home devices compatible with any OS. This is really great news tbh.
It’s similar to the USB C and emoji consortium to set standards.
Score: 5 Votes (Like | Disagree)
redpandadev Avatar
70 months ago
Sounds like the open standard, once available, will be largely based on HomeKit. If true, that is a HUGE win for Apple.
Score: 3 Votes (Like | Disagree)
Westacular Avatar
70 months ago

The company also confirmed that existing HomeKit accessories will remain compatible with the new protocol when it's eventually released.
No, they didn't: What Apple said was
Existing HomeKit accessories will continue to work after the new protocol becomes available since Apple plans to continue to support HAP for communication with smart home accessories in its ecosystem.
i.e., existing HomeKit accessories will continue to work using the existing HomeKit Accessory Protocol even after the new Connect Home over IP protocol is finalized and adopted. Apple's saying both protocols will be supported by their devices. Apple is not saying that random HomeKit accessories will suddenly learn how to speak the new protocol.
Score: 3 Votes (Like | Disagree)
Applebot1 Avatar
70 months ago
Open standards is best for consumer. Good move; let’s see how it pans out ;)
Score: 2 Votes (Like | Disagree)
dewalt Avatar
70 months ago
This may mean homebridge will be recoded, but it should be a better outcome.
Score: 1 Votes (Like | Disagree)
Smith288 Avatar
70 months ago

This may mean homebridge will be recoded, but it should be a better outcome.
This is right in the homebridge's wheelhouse. Im excited
Score: 1 Votes (Like | Disagree)

Popular Stories

iPhone 17 Pro Blue Feature Tighter Crop

iPhone 17 Pro Launching Later This Year With These 13 New Features

Wednesday April 23, 2025 8:31 am PDT by
While the iPhone 17 Pro and iPhone 17 Pro Max are not expected to launch until September, there are already plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models as of April 2025: Aluminum frame: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone 16 Pro models have a titanium frame, and the iPhone ...
iPhone 17 Air Pastel Feature

iPhone 17 Air Launching Later This Year With These 16 New Features

Thursday April 24, 2025 8:24 am PDT by
While the so-called "iPhone 17 Air" is not expected to launch until September, there are already plenty of rumors about the ultra-thin device. Overall, the iPhone 17 Air sounds like a mixed bag. While the device is expected to have an impressively thin and light design, rumors indicate it will have some compromises compared to iPhone 17 Pro models, including only a single rear camera, a...
apple watch ultra yellow

What's Next for the Apple Watch Ultra 3 and Apple Watch SE 3

Friday April 25, 2025 2:44 pm PDT by
This week marks the 10th anniversary of the Apple Watch, which launched on April 24, 2015. Yesterday, we recapped features rumored for the Apple Watch Series 11, but since 2015, the Apple Watch has also branched out into the Apple Watch Ultra and the Apple Watch SE, so we thought we'd take a look at what's next for those product lines, too. 2025 Apple Watch Ultra 3 Apple didn't update the...
iphone 17 dummies sonny dickson

iPhone 17 Air Almost as Thin as Its Buttons, New Images Show

Thursday April 24, 2025 2:14 am PDT by
If you missed the video showing dummy models of Apple's all-new super thin iPhone 17 Air that's expected later this year, Sonny Dickson this morning shared some further images of the device in close alignment with the other dummy models in the iPhone 17 lineup, indicating just how thin it is likely to be in comparison. The iPhone 17 Air is expected to be around 5.5mm thick – with a thicker ...
AirPods Pro 3 Mock Feature

AirPods Pro 3 Just Months Away – Here's What We Know

Friday April 18, 2025 5:16 am PDT by
Despite being more than two years old, Apple's AirPods Pro 2 still dominate the premium wireless‑earbud space, thanks to a potent mix of top‑tier audio, class‑leading noise cancellation, and Apple's habit of delivering major new features through software updates. With AirPods Pro 3 widely expected to arrive in 2025, prospective buyers now face a familiar dilemma: snap up the proven...
ipad air magic keyboard feature

iPadOS 19 Rumored to Show Mac-Like Menu Bar When Connected to Magic Keyboard

Thursday April 24, 2025 12:09 pm PDT by
When an iPad running iPadOS 19 is connected to a Magic Keyboard, a macOS-like menu bar will appear on the screen, according to the leaker Majin Bu. This change would further blur the lines between the iPad and the Mac. Bloomberg's Mark Gurman previously claimed that iPadOS 19 will be "more like macOS," with unspecified improvements to productivity, multitasking, and app window management,...
top stories 2025 04 26

Top Stories: iPhone 17 Air Rumors, Apple Watch Turns 10, and More

Saturday April 26, 2025 6:00 am PDT by
We've known for quite some time about Apple's plans for a thinner "iPhone 17 Air" coming later this year, but wow, the latest dummy models give us our best look yet at just how thin this phone is going to be. Other Apple news and rumors this week included another iOS 18.5 beta, the 10th anniversary of the Apple Watch launch, and more management reshuffling in Apple's Siri division, so read...
Global Close Your Rings Day Pin

Apple Stores Giving Away a Limited-Edition Pin For Free Today

Thursday April 24, 2025 10:15 am PDT by
Starting today, April 24, Apple Stores around the world are giving away a special pin for free to customers who request one, while supplies last. Photo Credit: Filip Chudzinski The enamel pin's design is inspired by the Global Close Your Rings Day award in the Activity app, which Apple Watch users can receive by closing all three Activity rings today. The limited-edition pin is the physical...