watchOS 27 Public Beta: Siri AI, Gestures, and the Biggest Compatibility Cut in Years

The watchOS 27 public beta — released on July 13, 2026 — is Apple's most ambitious watch update in years. It introduces a conversational Siri AI assistant, a redesigned dynamic app grid, a one-handed tap gesture, smarter Smart Stack, and several health and fitness upgrades. But access comes with the strictest device compatibility list Apple has ever required and a major regional lockout for Siri AI in the European Union ^FRNA.

Device Compatibility: Only Six Models Make the Cut

watchOS 27 drops support for five Apple Watch models, leaving only the most recent hardware eligible ^TAM.

Supported models (requires S9 or newer chip):

• Apple Watch Series 9
• Apple Watch Series 10
• Apple Watch Series 11
• Apple Watch SE (3rd generation)
• Apple Watch Ultra 2
• Apple Watch Ultra 3

Dropped models (no longer supported):

• Apple Watch Series 6
• Apple Watch Series 7
• Apple Watch Series 8
• Apple Watch SE (2nd generation)
• Apple Watch Ultra (1st generation)

Apple stated these older models lack the neural engine power required for Siri AI and the new on-device intelligence features ^FA. An iPhone 11 or later running iOS 27 is also required ^IR.

Siri AI: A Conversational Assistant Finally on Your Wrist

Siri AI is the headline feature of watchOS 27. Powered by Apple Intelligence, it transforms Siri from a simple command taker into a conversational assistant that can handle open-ended questions, personal context, and in-app actions directly on the watch ^DIA.

Key capabilities include:

• Conversational AI assistant — Ask open-ended questions, brainstorm workout routines, and get context-aware answers without pulling out your iPhone ^DI.
• Standalone Siri AI app — For the first time, a dedicated Siri app arrives on Apple Watch, syncing conversations across iPhone, iPad, Mac, and Apple Vision Pro ^FR9.
• Personal context and in-app actions — Siri understands your health data, messages, and calendar, and can take actions inside third-party apps ^IF9.
• Rollout timing — Siri AI was not present in early betas. It first appeared in developer Beta 3 in early July 2026 and is now included in the public beta. Apple says full capabilities will launch "later this year" in English only ^RAA.

Siri AI on Apple Watch relies on a connected iPhone that supports Apple Intelligence (iPhone 11 or later) ^AF.

Redesigned Interface: Dynamic App Grid and Smarter Smart Stack

Dynamic app grid — Pressing the Digital Crown now shows a new grid with the Siri AI app fixed in the center, surrounded by five recently used and Siri-suggested apps. Swiping up reveals the traditional full grid or list view ^DMM9.

Smarter Smart Stack — The Smart Stack is more proactive, surfacing relevant widgets based on time, location, and activity context ^R9.

Gesture Controls: One-Handed Tap Gesture

One-handed tap gesture — Tap your thumb and index finger together once to select widgets in the Smart Stack and interact with the interface without using your other hand. No new hardware sensor is required ^R9T. This completes a navigation sequence where a double tap scrolls through Smart Stack widgets, a single tap selects the highlighted widget, and a wrist flick returns to the watch face ⁹.

Fitness and Health Upgrades

Workout Buddy improvements — The AI-powered fitness coach now surfaces more varied data insights, including pace trends, recovery suggestions, and form cues. It also works in Spanish for the first time and no longer requires a nearby iPhone to operate ^DFMM.

Perimenopause and menopause tracking — New Health app support for logging and tracking perimenopause and menopause symptoms ^MMM.

Key Limitations: Regional Lockout and Beta Caveats

No Siri AI in the European Union — Due to the Digital Markets Act (DMA), Siri AI is entirely unavailable on Apple Watch in the EU. Apple confirmed that EU users will not get the Siri AI app or any of its advanced capabilities on watchOS 27. Only Mac and Apple Vision Pro will have it in the region ^AGNA. Because Siri AI on Apple Watch depends on a paired iPhone with Siri AI, the iPhone's EU block effectively blocks the watch too ^AA.

Public beta caveats — As with any beta, some features may be unstable, incomplete, or removed before the final fall release ^R.

The Bottom Line

watchOS 27 is a significant step forward for the Apple Watch, bringing genuine AI-powered assistance and thoughtful interface improvements. But it comes at a cost: a dramatically narrowed compatibility list and a frustrating regional block that leaves millions of EU users without the update's marquee feature.