Bold statement: iOS 26.4 adds a new Average Bedtime metric and brings blood oxygen back to the Vitals graph, signaling a clearer, more comprehensive view of your health data—if you know where to look. But here's where it gets controversial: not all devices or regions get the same features, and Apple’s history with blood oxygen has been complex due to ongoing legal and compatibility concerns.
Here’s a clear, beginner-friendly rewrite of the core update:
- iOS 26.4 introduces an Average Bedtime metric in the Sleep section of the Health app. This helps users track how their typical bedtimes influence sleep quality over time.
- In the Sleep Highlight, the app now shows two key times: the actual time you went to bed and your average or usual bedtime calculated from a two-week window.
- The prior iOS 26.3 behavior—which displayed average sleep duration over the past seven days—remains available as a separate highlight, but now includes the new bedtime readout as well.
- Blood oxygen appears again in the Vitals section, and it is now visible on the daily Vitals line graph. Previously, blood oxygen existed as a standalone metric, but the daily graph did not display it. With 26.4, you can see blood oxygen directly in the overview.
- The history behind blood oxygen in the Health ecosystem is tied to Apple’s legal dispute with Masimo over oxygen-sensing patents. Masimo had claimed patent infringement and secured an import ban in the U.S., prompting Apple to remove blood oxygen sensing from Apple Watch in early 2024. Apple reintroduced blood oxygen readouts on iPhone in August 2025, but there was no wrist-on capability for U.S. users at that time.
- iOS 26.4 is currently available to developers and public beta testers, with a broader public release planned for spring.
Why this matters in practical terms:
- With Average Bedtime, you can more easily see whether a consistent sleep schedule correlates with better rest and daytime wakefulness.
- Bringing blood oxygen data into the Vitals overview makes it simpler to monitor respiratory health trends alongside other metrics without juggling separate screens.
Controversy and questions to consider:
- Do you trust a two-week average for bedtime, or would you prefer longer or shorter windows? How does this affect your interpretation of your sleep quality?
- Should blood oxygen be fully available on all devices and in all regions, given past legal disputes? What level of reliability do you expect from on-device health readings?
If you’d like, I can tailor this rewrite for a specific audience (tech-savvy readers, health beginners, or Apple ecosystem enthusiasts) or adjust the tone to be more casual or more formal. Would you prefer a version with added real-world examples or a short FAQ section?
