Apple watchOS 4 End of Life
Support dates and upgrade guidance — rebuilt from live data.
End of Life
Apple watchOS 4 reached end of life on 17 Sept 2018. It no longer receives security fixes.
2,940 days without security patches
Recommended action: upgrade to Apple watchOS 27. Support timeline
Official dates from the Apple watchOS release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 19 Sept 2017 | 9y 1mo ago |
| Security Support ended | 17 Sept 2018 | 8y 1mo ago |
| Latest release | 4.3.2 · 9 Jul 2018 | final |
Where to go from 4
Recommended target: Apple watchOS 27.
The newest actively supported branch is Apple watchOS 27 (latest release 27.0.1).
Frequently asked questions
Is Apple watchOS 4 still safe to use?
Apple watchOS 4 reached end of life on 17 Sept 2018, 2,940 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Apple watchOS 4?
Yes — the final release (4.3.2) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Apple watchOS 4 to?
Upgrade to Apple watchOS 27, the newest actively supported branch.