watchOS · Released 2025-09-19 · Global / first-wave availability reference
Security support ends
Unknown
No verified support end date has been recorded.
No separate final major version release date is specified. Security support ends separately.
Apple Watch Ultra 3 · Support commitment
No separate final major version release date is specified. Security support ends separately.
First-wave availability: 2025-09-19. Original OS: 26. Verified compatible branch: 27.0.1. Apple release lists establish observed compatible updates, not guaranteed future duration. Future upgrade count, final OS and end date are not established.
Apple release lists establish observed compatible updates, not guaranteed future duration. Future upgrade count, final OS and end date are not established.
Image source ↗ · Apple
Manufacturer product render, resized. © Apple.
Sources substantiate only the indicated claims; missing values cannot be inferred from them.
Apple · Last verified 2026-10-08
iOS 27.0.1 released 2026-09-28 for iPhone 11 and later. Latest iOS entry at verification. Compatibility proves active software support, not a guaranteed end date.
Apple · Last verified 2026-10-23
Historical original OS and availability; preorder is not retail day.