Watch & watchOS
Apple Watch
Apple Watch
Apple Watch Ultra 4
Runs the current release — watchOS 27
Apple lists this model as compatible with watchOS 27. Individual features can still need newer hardware.
watchOS releases it runs
-
watchOS 27
Released Sep 2026 · latest 27.0.1
Only releases checked against a source are listed. Osnivo currently tracks watchOS 10 and later.
Other Apple Watch models
At a glance
- Platform
- Watch · watchOS
- Family
- Apple Watch
- Model numbers
- A3579, A3580