Apple is bringing its next-generation Siri AI to Apple Watch through watchOS 27, marking the first time the company's on-device intelligence system reaches the wrist. The public beta, now available through Apple's Beta Software Program, introduces Siri AI powered by Apple Intelligence, along with smarter widgets, new gesture controls, and health tracking improvements designed to make the Apple Watch more helpful throughout the day.

What Makes Siri AI Different on Apple Watch?

The biggest addition in watchOS 27 is Siri AI, which brings capabilities previously limited to iPhones and Macs to the wrist for the first time. Unlike the older Siri, this version can answer complex questions, understand follow-up requests, recognize personal context, and perform actions across supported apps without requiring users to pull out their iPhone. Users can start a conversation on their iPhone and seamlessly continue it on their Apple Watch using a dedicated Siri app that privately syncs conversation history through iCloud.

The on-device AI can help locate information from Mail, Messages, Notes, Calendar, and other supported apps, making it genuinely useful for quick information retrieval. This represents a significant shift from traditional voice assistants that rely on cloud processing and database lookups. The technology stems from Apple's decade-long investment in machine learning and artificial intelligence, which originated during the company's now-cancelled self-driving car project.

How Does Apple's AI Infrastructure Power These Features?

Apple's approach to on-device AI relies on dedicated hardware called the Neural Engine, a specialized portion of Apple's chips responsible for processing artificial intelligence directly on the device rather than sending data to remote servers. This technology was developed as part of Project Titan, Apple's ambitious but ultimately unsuccessful self-driving car initiative that ran from approximately 2014 until early 2024. Although the car project was shelved, the AI infrastructure it created became foundational to Apple's entire product ecosystem.

"Most notably, that effort gave rise to its Neural Engine, the dedicated portion of Apple's chips responsible for on-device AI processing," reported Mark Gurman, a technology journalist covering Apple developments.

Mark Gurman, Technology Journalist

The Neural Engine first powered Face ID in the iPhone X and has since been integrated into every Apple silicon chip, from the M1 MacBook processors to the latest M5 chips. Apple is already developing the M6, M7, and M8 chips, all prioritizing AI capabilities at the hardware level. This infrastructure allows Apple Intelligence features to run privately on devices without constantly uploading personal data to the cloud.

What New Features Arrive With watchOS 27?

Beyond Siri AI, watchOS 27 introduces several intelligence-driven improvements across the Apple Watch experience. The update redesigns the app grid to put Siri at the center while surrounding it with recently used and frequently accessed apps for quicker navigation. Smart Stack, the widget carousel on Apple Watch, becomes more proactive by surfacing relevant information based on context.

• Contextual Widget Suggestions: Smart Stack can suggest resuming a Siri conversation, remind users to adjust alarms before upcoming holidays, display a boarding pass at the airport, or recommend Theater Mode when arriving at a concert.
• Gesture Controls: A new one-handed tap gesture works alongside the existing Double Tap feature, allowing users to navigate Smart Stack, select widgets, and return to the watch face without touching the display.
• Health Tracking Enhancements: Workout Buddy receives Apple Intelligence enhancements that provide personalized coaching and recognize long-term workout trends, while treadmill workout accuracy improves with updated machine learning models.
• Cycle Tracking Expansion: Users aged 40 and older gain notifications when logged patterns may suggest perimenopause, along with expanded symptom tracking and educational resources.
• Simplified Find My: The Find My experience consolidates into a single app for locating compatible Apple devices and accessories, including iPhone, AirTag, and AirPods.

Which Apple Watch Models Support watchOS 27?

The watchOS 27 public beta is compatible with a broad range of Apple Watch hardware, ensuring that most recent owners can participate in testing. Compatible models include the Apple Watch Series 9, Series 10, Series 11, Ultra 2, Ultra 3, and SE (3rd generation). Users will need a paired iPhone running the iOS 27 Public Beta to install the update, as watchOS cannot be downgraded after installation.

How to Install watchOS 27 Public Beta

• Prerequisites: Update your paired iPhone to the iOS 27 Public Beta before attempting to install watchOS 27 on your Apple Watch.
• Enrollment: Sign in to the Apple Beta Software Program with your Apple Account to gain access to pre-release software.
• Installation Steps: Open the Watch app on your paired iPhone, navigate to My Watch, then General, then Software Update, then Beta Updates, and select watchOS 27 Public Beta.
• Device Preparation: Ensure your Apple Watch has at least 50% battery charge, remains connected to its charger, and stays near your iPhone during the installation process.
• Important Limitation: Unlike iPhone, iPad, and Mac beta software, watchOS cannot be downgraded after installation, so users encountering issues must wait for Apple to release a newer beta update.

Apple is expected to continue updating watchOS 27 throughout the summer before the final version launches alongside new Apple Watch models later in 2026. The public beta represents an important milestone in bringing Apple Intelligence to the company's wearable devices, extending the on-device AI capabilities that have become central to Apple's product strategy following the conclusion of its self-driving car ambitions.