Quick hits: September 2025

Apple watch blood oxygen feature makes a comeback in the U.S.

Apple has officially re-enabled the blood oxygen monitoring function on Apple Watch Series 9, Series 10, and Ultra 2 models sold in the United States. The feature returns through the latest iOS 18.6.1 and watchOS 11.6.1 updates, marking the end of a months-long restriction caused by a patent dispute that temporarily blocked the technology for U.S. users. In its redesigned form, the blood oxygen readings are now processed entirely on the paired iPhone rather than directly on the watch, a technical change that sidesteps the legal issues while

Chatgpt-5 brings more accuracy, speed, and personalization options

OpenAI has rolled out GPT-5, the most advanced version of its flagship AI model to date, delivering significant upgrades in reasoning, speed, and overall accuracy. The new system reduces “hallucinations,” or incorrect outputs, by improving fact-checking processes and incorporating more robust training data. GPT-5 also introduces four unique conversation “personalities” — Cynic, Robot, Listener, and Nerd — allowing users to tailor interactions to different moods or needs. For Plus and Pro subscribers, the update adds integration with Google Calendar and Gmail, offering seamless scheduling and inbox keeping the functionality intact.

Data appears in the Health app’s “Respiratory” section, where users can still view historical trends, track daily averages, and monitor changes over time. The move comes after a recent decision by the U.S. Customs and Border Protection, which cleared the path for the feature’s return. Apple has emphasized that accuracy and usability remain on par with the original design, despite the change in data processing location. For many owners, the update restores a key health-tracking capability that was a deciding factor in their purchase. Analysts expect the reinstatement to boost customer satisfaction and potentially drive renewed sales for the affected models.

Health experts also note that regular blood oxygen tracking can be especially valuable for athletes, people at high altitudes, or those managing respiratory conditions.