78 OS releases, 166 features in database
watchOS watchOS 27Beta
10 Features
| AI & Intelligence | ||
| Siri AI | Beta; English first, later in 2026 | New in watchOS 27 |
| Health & Fitness | ||
| Improved Treadmill Tracking | More accurate indoor distance | New in watchOS 27 |
| Menopause Tracking | Perimenopause/menopause in Cycle Tracking | New in watchOS 27 |
| System & Continuity | ||
| Call Context | Coming in English; surfaces info during business calls | New in watchOS 27 |
| Custom Wallet Passes | QR/barcode membership cards | New in watchOS 27 |
| Find My Redesign | Unified map-centric Devices/People/Items | New in watchOS 27 |
| Guest Key | Share a guest home key from Apple Watch | New in watchOS 27 |
| Siri App | New in watchOS 27 | |
| UI & Design | ||
| Dynamic App Grid | Highlights Siri-suggested & frequent apps | New in watchOS 27 |
| Smart Stack Tap Gesture | Tap index finger & thumb to pick a widget | New in watchOS 27 |
Related Take Control Books
 | Take Control of Apple Watch | Customize your Apple Watch, personalize watch faces, and master health, fitness, communications, and core apps—covers all models through Series 11 and watchOS 26. |
 | Take Control of Siri | Get the most from Siri across iPhone, iPad, Mac, Apple Watch, Apple TV, and HomePod—including Apple Intelligence features and ChatGPT integration. |
 | Take Control of FaceTime and Messages | Master FaceTime, Messages, and Phone across iOS, iPadOS, macOS, and watchOS—from screen sharing and group calls to live translation and call screening. |
 | Take Control of Find My and AirTags | Track your devices, items like AirTags, and friends through Apple Find My—with full coverage of location sharing and privacy protections against unwanted tracking. |
6 Supported Devices
Devices that can run watchOS 27. Final compatibility for this beta isn't confirmed—these are expected based on current support.
| Device | Released | watchOS |
|---|---|---|
| Apple Watch SE (3rd generation) | Sep 2025 | 26 (still supported) |
| Apple Watch Series 11 | Sep 2025 | 26 (still supported) |
| Apple Watch Ultra 3 | Sep 2025 | 26 (still supported) |
| Apple Watch Series 10 | Sep 2024 | 11 to 26 (still supported) |
| Apple Watch Series 9 | Sep 2023 | 10 to 26 (still supported) |
| Apple Watch Ultra 2 | Sep 2023 | 10 to 26 (still supported) |
Last Model Not Compatible
The newest model in each product line that can’t run watchOS 27—the support cutoff sits just above these.
| Product line | Last incompatible model | Released | Tops out at |
|---|---|---|---|
| Apple Watch Ultra | Apple Watch Ultra | Sep 2022 | watchOS 26 |
| Apple Watch | Apple Watch Series 8 | Sep 2022 | watchOS 26 |
| Apple Watch SE | Apple Watch SE (2nd generation) | Sep 2022 | watchOS 26 |