Blood Oxygen app unavailable on Apple Watch ULTRA 2
Blood Oxygen app still unavailable on Apple Watch ULTRA 2 after updating watch to 11.6.1 and iPHONE 16 to 18.6.1 yesterday
Apple Watch Ultra 2, watchOS 11
Question marked as
Found this by Googling Blood O2 app not working and it fixed mine
The Blood Oxygen app is available on Apple Watch Series 6 and later, including Apple Watch SE (2022), Apple Watch Ultra, and Apple Watch Ultra 2. It is not supported on earlier models such as Series 5, Series 4, or the original Apple Watch SE. If you have a compatible model and still cannot use the feature after updating, you may be affected by the bug described below.
How to fix Blood Oxygen not working on watchOS 11.6.1
Zollo’s method uses other health sensors on the Apple Watch to “wake” the Blood Oxygen function:
- Open the Heart Rate app on your Apple Watch.
- Take a manual heart rate reading.
- Open the ECG app.
- Perform a full ECG reading.
After completing these steps, the Blood Oxygen app may reappear as active, allowing you to take measurements normally.
Why this Blood Oxygen fix might work
The exact reason this sequence works is unclear, but it likely forces watchOS to refresh sensor permissions and availability, triggering the Blood Oxygen feature to become accessible again.
