📖 iOS 18.6.1 Update – Complete Guide
Apple has officially released iOS 18.6.1 on August 14, 2025, bringing a much-awaited fix for Apple Watch users in the United States. While this update does not introduce a long list of new features, it is a critical patch for restoring Blood Oxygen monitoring on supported Apple Watches. Let’s explore all the important details.
🔹 What’s New in iOS 18.6.1?
Unlike big upgrades, iOS 18.6.1 is a minor update but plays a major role for Apple Watch owners:
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Restores Blood Oxygen Monitoring in the U.S.
Due to a past patent dispute, the Blood Oxygen app was disabled on Apple Watch Series 9, Series 10, and Apple Watch Ultra 2. With iOS 18.6.1 and watchOS 11.6.1, Apple brings it back with a new workflow. -
How it works now:
- The Apple Watch still measures oxygen levels.
- Instead of showing results directly on the Watch, the data is processed on the paired iPhone.
- Results appear in the Health app > Respiratory section on iPhone.
This smart workaround ensures users regain access to vital health data without violating earlier restrictions.
🔹 Eligible Devices for iOS 18.6.1
The update is available for all devices that support iOS 18, including:
- iPhone 15 series
- iPhone 14 series
- iPhone 13 series
- iPhone 12 series
- iPhone 11 series
- iPhone XS, XS Max, XR
- iPhone SE (2nd gen and later)
🔹 How to Update to iOS 18.6.1
Updating your device is simple:
- Open Settings on your iPhone.
- Tap General > Software Update.
- Download and install iOS 18.6.1.
👉 For Apple Watch users:
- Open the Watch app on iPhone.
- Go to General > Software Update.
- Install watchOS 11.6.1 for full functionality.
🔹 Why This Update Matters
- Health enthusiasts regain Blood Oxygen tracking for wellness and fitness.
- No major security patches, but recommended for performance stability.
- Keeps your iPhone and Apple Watch synced with the latest Apple ecosystem improvements.
📌 Final Thoughts
The iOS 18.6.1 update might look small on paper, but it delivers a big win for Apple Watch users in the U.S. With the restored Blood Oxygen experience, Apple continues its focus on health and innovation. If you own a compatible iPhone and Apple Watch, it’s highly recommended to install this update.