Apple Watch Series 12 and Ultra 4 reviews: Look out, Oura Ring

First reviews of the Apple Watch Series 12 and Ultra 4 arrived ahead of sales starting September 18. Reviewers highlight the S11 chip with faster Siri AI, more frequent heart rate and HRV measurement, a Readiness app without a subscription, and up to 48 hours of battery life on the Ultra 4.

• S11 chip speeds up Siri AI requests on Series 12
• HRV measured up to 24 times more often, heart rate more accurate
• Ultra 4 lasts 48 hours on one charge with workouts and sleep
• Readiness score updates through the day without a subscription